Language：English   Publishing type：Research paper (bulletin of university, research institution)  

DOI： https://doi.org/10.5109/4363556

Repository Public URL： http://hdl.handle.net/2324/4363556

Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

DOI： https://doi.org/10.5109/4363552

Repository Public URL： http://hdl.handle.net/2324/4363552

Language：English   Publishing type：Research paper (scientific journal)  

Language：Japanese  

Language：Japanese  

Language：English   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/00380768.2018.1443399

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (scientific journal)  

Language：Japanese  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Repository Public URL： http://hdl.handle.net/2324/1445772

Language：Japanese   Publishing type：Research paper (scientific journal)  

Repository Public URL： http://hdl.handle.net/2324/1790503

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compag.2013.09.003

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/25200

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/25170

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/25171

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compag.2012.02.001

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/19540

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/16108

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/10077

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/10076

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

Vertical profiles of wind velocity in and around a rice canopy at three different growing stages were experimentally investigated using a wind tunnel. The vertical profiles were measured between rows of rice bunches and above bunches in a rice canopy, and between rows and behind bunches outside the canopy. Each vertical profile was compared with the input profile of wind velocity, and trends in attenuation and acceleration of wind were examined. It was found that wind was acceler-ated above rice bunches, and the extent of acceleration depended on a growing stage of rice. For ver-tical profiles between rows of rice bunches, attenuation of wind velocity was found at the area that the rice bunches spread out leaves between rows, and wind was accelerated above and below the area. A peak location of attenuation behind bunches changed depending on a growing stage. For lo-cations below appearance height of a rice canopy, the peak of attenuation appeared right behind the rice bunch 8. The wind velocity decreased by 60 % at the growing stage 2nd and 3rd. For locations above appearance height of a rice canopy, acceleration was prominent at the 3rd growing stage, and the wind velocity increased by 60%.

Repository Public URL： http://hdl.handle.net/2324/9298

Language：English   Publishing type：Research paper (scientific journal)  

The system for delivering tracing caplets into grain on a combine was developed as a part of a grain traceability system. A commercially available seed dispenser was utilized to meter tracing caplets into wheat in the combine bin tank during the unloading process. The caplets were delivered into the grain stream close to the unloading auger to attain uniform distribution. The distribution uniformity of caplets was sampled on five consecutive bin loads, with six one-liter grain samples from each load. The number of caplets in the samples was reasonably consistent at unloading time of 20 and 30 sec. when the grain unloading rate was stable. However, caplet concentration increased as grain flow was reduced at the beginning and end of each unloading event and caplets that remained in the grain tank sump after each test was discharged in high concentrations at the beginning of the subsequent unloading process.

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (scientific journal)  

Horizontal and vertical reaction forces of rice and wheat stalks gathered by a combine harvester reel were measured by the experiment system newly developed, in order to clarify dynamic re-sponse of the crop stalks related to the gathering performance and to discuss the application of a quasi-static stalk bending analysis to the determination of the reaction force of crop stalks under dynamic loading conditions. The experiment was conducted under 5 different loading speeds, and the effect of the loading speed on the reaction force was investigated. As the results of experiment, as the loading speed increased, the horizontal force had a large positive peak value, while the verti-cal force involved the change in the force direction and had a negative peak value, depending on the initial deflection shape of crop stalks. Thus, the simulated results by the stalk bending analysis in-volved a large amount of error, and limitations of the analytical method were identified.

DOI： 10.1016/j.biosystemseng.2004.04.010

Language：English   Publishing type：Research paper (scientific journal)  

The reaction force of a rice stalk undergoing forced displacement was analysed based on a mechanical model of a crop stalk. Horizontal and vertical reaction forces of a single rice stalk undergoing forced displacement were measured. The horizontal force increased linearly for small curvatures of the rice stalk, after that, force increments decreased with displacement due to large curvature of the stalk. The vertical reaction force had different tendencies, depending on the initial shape of the rice stalk. The main reason for the differences was a directional change in friction, depending on the initial shape. An intrinsic shape function of a rice stalk was proposed. An equation of curvature describing rice stalk bending was derived by considering the curvature due to intrinsic shape, and used for analysis of the reaction force. The analytical results coincided fairly well with measured values, and it was demonstrated that the reaction forces of a single rice stalk according to the initial shape was accurately predicted by numerical calculation.

DOI： 10.1016/S1537-5110(03)00132-6

Language：English   Publishing type：Research paper (scientific journal)  

In the present study, the reaction force of a wheat stalk undergoing forced displacement, which was one of the important deflection characteristics, was clarified by experiment and theory. First, the horizontal and vertical reaction forces of a single wheat stalk undergoing forced displacement were measured. The horizontal force increased linearly together with increment of the forced displacement, while the vertical force had different tendencies depending on the initial posture of a wheat stalk. From experimental results, it was examined that a main reason of differences in the tendencies of the vertical force was a directional change of friction depending on the initial posture. Therefore, a differential equation describing deflection, taking into account the initial posture of a wheat stalk, was derived based on a mechanical model of a crop stalk and used for analysis of the reaction forces. In this analysis, the effect of friction was also considered. The analytical results agreed well with measured values, and it was shown that the reaction forces of the wheat stalk according to the initial posture was analyzed accurately utilizing the derived equation.

Language：English   Publishing type：Research paper (scientific journal)  

In the present paper, the equation describing deflection derived in our previous work was applied to a bunch of wheat stalks in order to analyze their reaction force and posture during gathering operations. First, the initial posture of a bunch of wheat stalks was simulated based on the assessment parameters of posture by which the lodging extent of the wheat stalks was determined. The simulated results were shown to be effective based on a comparison with actual images, thus the reaction forces of a bunch of wheat stalks undergoing forced displacement were analyzed according to their simulated initial posture. The analytical results agreed well with measured values, and it was demonstrated that the reaction forces involving the effects of the stalks’ initial posture were predicted specifically in the case of a bunch of wheat stalks as well.

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (scientific journal)  

The analytical method for the reaction force of crop stalks undergoing forced displacement, which has been verified for a bunch of wheat stalks, was applied to analysis of a bunch of rice stalks. The reaction forces of the rice stalk’s bunches with various initial shapes were analyzed, and the ac-curacy was assessed by experimental results. The analytical results involved a certain amount of er-ror, depending on the accuracy of the simulated initial shape, but were reasonably close. It was demonstrated that the reaction force according to the initial shape could be predicted utilizing the previous analytical method in the case of the bunch of rice stalks as well.

Repository Public URL： http://hdl.handle.net/2324/4541

Language：English   Publishing type：Research paper (scientific journal)  

The relationships between the deflection and deflection force acting on a bunch of crop stalks in the gathering operations of a combine harvester reel were analysed. Two mechanical crop models based on bending theory with regard to an elastic beam were applied in this analysis. In the first model, the sectional heterogeneity of a stalk is expressed as the different flexural rigidity of each internode. In the second model, the effect of a crop ear is added to the first model. The application of the mechanical models to the reel operations and the analytical methods of the deflection force were investigated using experiments involving reel operations.
The results showed that the effect of both the buckling load due to the weight of the ear and the vertical force component acting on the crop stalks increased noticeably with the increment of de-flection imposed by the gathering operations. The prediction of the relationships between deflection and deflection force in the second model involved a certain amount of error due to the effect of the initial posture of the crop stalk and the vertical force component, but coincided approximately with the experimental results. Thus, it was suggested that the model that took into account the effect of the crop ear was useful for investigat-ing reel-crop interactions, and that the analytical accuracy of the deflection force would be increased by considering the effect of the vertical force component. Further, based on the above re-sults, a posture analysis of a bunch of crop stalks during reel operations was conducted.

DOI： 10.1016/S1537-5110(02)00176-9

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (scientific journal)  

The purpose of the present study is to clarify reel operations appropriate to crop conditions, such as a crop's physico-mechanical properties and the extent of lodging, from the viewpoint of the mechanical interactions between the crops and a combine harvester reel. First, because the gathering processes by the reel involve mechanical operations of forced displacement, the horizontal and vertical reaction forces of a bunch of crop stalks (rice and wheat stalks) undergoing the forced displacement were measured. Further, a bunch of crop stalks, which has conventionally been complicated in dealing, was considered as a composition of a single crop stalk, and the reaction forces of crop stalks were analyzed numerically using a differential equation describing deflection, which was derived based on a mechanical model of a crop stalk.
As the results, the horizontal reaction forces increased linearly with the in-crement of forced displacement (deflection), while the vertical ones changed its direc-tion and magnitude depending on relationship between crop posture and frictional force. The simulated results of the trends of the reaction forces agreed approximately with measured ones. This suggested that the analytical method of determining reaction forces based on the derived equation could be utilize for investigating reel-crop interactions. This paper also presents posture analysis of a bunch of crop stalks during gathering op-erations.

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publisher：The Japanese Agricultural Systems Society  

<p>Rice production in Japan faces concerns over yield reduction and poor grain quality owing to unstable weather conditions and the deterioration of soil fertility. In addition, it needs to increase competitiveness against foreign agricultural products and other food products. This situation requires to develop analytical methods to effectively use data regarding agriculture, which is becoming easily available with information and communication technologies. The objectives of this study were 1) to build the predictive model of three classes (low, middle, and high) of ripened brown rice yield using data collected in the production sites, 2) to clarify limiting factors of yield using the predictive model, and 3) to investigate measures to improve yield. We applied support vector machine to build the predictive model using data collected from 2011 to 2016 in a total of 90 paddy fields. The paddy fields where Hinohikari cultivar was cultivated were located in the city of Itoshima, Fukuoka Prefecture. The predictive model built included three explanatory variables: the number of rough rice, daily mean sunshine hours during the period from five days after heading to the late ripening period, and mineral nitrogen supply from the early panicle formation to the late ripening periods. The predictive model achieved the classification accuracy of 77.8%. Particularly, paddy fields categorized in the low yield class had small tiller number at the panicle initiation stage. As the result, small number of rough rice decreased yield. Some paddy fields, where their yield was categorized in the middle class and was categorized in the high class with the number of rough rice greater than 28 thousand m^-2, reduced yield because of shortage of mineral nitrogen supply during the ripening period. The measures to improve yield were as follows: for the paddy fields categorized in low yield class, to ensure appropriate number of rough rice by increasing tiller number during the vegetative growth stage, and for paddy fields where shortage of mineral nitrogen supply during the ripening period reduced yield, to apply topdressing two times to meet the standard nitrogen application rate in the surveyed region (3.6 kg/10a in total). This measure obtained for topdressing indicates that the analysis using survey data collected in rice production sites supported the standard that has been determined by local cultivation tests as well as trial and error in the production sites.</p>

DOI： 10.14962/jass.38.1_1

CiNii Research

Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.biosystemseng.2019.04.002

Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (other academic)  

DOI： 10.1109/ICSensT.2017.8304486

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/1854043

Language：English   Publishing type：Research paper (scientific journal)  

Language：Japanese  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.biosystemseng.2016.07.004

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.compag.2016.04.025

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/1564097

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Language：English   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

The cultivation area of rice for whole crop silage (WCS) has rapidly increased in the last decade in Japan due to increasing demand for domestic livestock feed as well as a measure for the use of redundant paddy field. On the other hand, the production cost of rice for WCS is largely supported by subsidy now, so it is required to reduce the production cost. Manure ap-plication is a prospective way to reduce the cost of fertilizer and to sustain soil fertility. Thus, we investigated the production of rice for WCS using manure in Itoshima region, Fukuoka Pre-fecture, Japan, from the aspects of soil fertility, plant growth, and dry matter weight. The fields where manure was applied showed relatively high TN contents in soil whereas fields where manure was not applied showed low TN contents. This result indicated that soil fertility can be deteriorated by the continuous production of rice for WCS when organic matter is not supplied by manure and other materials. Plant length (r=0.748*) and tiller number (r=0.891**) at panicle initiation stage were closely correlated with TN content in soil whereas SPAD readings (r=0.846**) at the same stage was closely correlated with mineralized N in soil. Dry matter weight was positively correlated with TN content in soil (r = 0.767**). Fields where manure was not applied had small dry matter weight although nitrogen was supplied from fertilizer. These results indicated that dry matter weight was significantly affected by soil fertility.

Repository Public URL： http://hdl.handle.net/2324/1526310

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/1543576

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/1543575

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/17816

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/17815

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/16136

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/9334

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/10097

Language：English   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/10099

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Repository Public URL： http://hdl.handle.net/2324/8889

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：Japanese   Publishing type：Research paper (bulletin of university, research institution)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Repository Public URL： http://hdl.handle.net/2324/4298

Language：Japanese   Publishing type：Research paper (scientific journal)  

Repository Public URL： http://hdl.handle.net/2324/4311

Language：Japanese   Publishing type：Research paper (scientific journal)  

Repository Public URL： http://hdl.handle.net/2324/4312

Language：English   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Repository Public URL： http://hdl.handle.net/2324/21082

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：つくば市   Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：つくば市   Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：つくば市   Country：Japan  

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：つくば市   Country：Japan  

Event date： 2023.9

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2022.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2022.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2022.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2020.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2020.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学筑紫キャンパス   Country：Japan  

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Country：Japan  

Event date： 2019.11

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2019.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：北海道大学農学部   Country：Japan  

Event date： 2019.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：北海道大学農学部   Country：Japan  

Event date： 2018.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛媛大学・樽味キャンパス   Country：Japan  

Event date： 2018.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：愛媛大学・樽味キャンパス   Country：Japan  

Event date： 2018.8 - 2018.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東海大学熊本キャンパス   Country：Japan  

Event date： 2017.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：網走市   Country：Japan  

Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：佐賀大学   Country：Japan  

Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農業大学   Country：Japan  

Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農業大学   Country：Japan  

Event date： 2017.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東北大学   Country：Japan  

Event date： 2016.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：佐賀大学   Country：Japan  

Event date： 2016.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学西新プラザ   Country：Japan  

Event date： 2016.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都大学   Country：Japan  

Event date： 2016.5

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岩手大学   Country：Japan  

Event date： 2015.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：鹿児島大学   Country：Japan  

Event date： 2015.8

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2015.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：鹿児島大学   Country：Japan  

Event date： 2015.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：鹿児島大学   Country：Japan  

Event date： 2015.8

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：鹿児島大学   Country：Japan  

Event date： 2015.3

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：日本大学   Country：Japan  

Event date： 2014.9 - 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：岩手大学   Country：Japan  

Event date： 2014.9 - 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都大学   Country：Japan  

Event date： 2014.9 - 2015.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：京都大学   Country：Japan  

Event date： 2014.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京農工大学   Country：Japan  

Event date： 2014.9

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2014.9

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2014.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学   Country：Japan  

Event date： 2014.8

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2014.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：琉球大学   Country：Japan  

Event date： 2013.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：帯広畜産大学   Country：Japan  

Event date： 2013.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：帯広畜産大学   Country：Japan  

Event date： 2013.8 - 2013.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：立命館アジア太平洋大学   Country：Japan  

Event date： 2013.8 - 2013.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：立命館アジア太平洋大学   Country：Japan  

Event date： 2013.8 - 2013.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：立命館アジア太平洋大学   Country：Japan  

Event date： 2013.8

Language：English   Presentation type：Oral presentation (general)  

Country：Viet Nam  

Event date： 2013.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：文部科学省研究交流センター（つくば市）   Country：Japan  

米生産において生育指標の計測や推定は、追肥の意思決定のための診断、収量・品質の予測、収量・品質の決定要因の解析を行う際に欠かせない。生育指標の中で、草丈、茎数、葉色は高価な機器を必要としないことから、慣行的に生産現場で計測されてきた。しかしながら、例えば茎数は、水田内のばらつきが大きく、多数の標本調査が必要であることから、労力・調査時間の面から多くの水田の値を得るのは困難である。このことは、サンプリング調査を必要とする乾物重、葉身窒素含量、窒素吸収量についても同様であり、これらの指標を簡易・省力的に計測もしくは推定する方法の開発が求められている。本研究では、植物面積指数（Plant Area Index）（以下、PAI）と葉緑素計値（以下、SPAD値）を用いた水稲の生育指標推定法を検討した。推定の対象は、乾物重（以下、DW）、茎数、乾物重当たりの葉身窒素含量（以下、Ndw）、面積当たりの葉身窒素含量（以下、Na）、稲体の窒素吸収量（以下、NU）であり、各々の推定精度の評価を行った。

Event date： 2012.9

Presentation type：Oral presentation (general)  

Venue：宇都宮大学（宇都宮市）   Country：Japan  

我が国の米生産は，消費者の安全・高品質志向，懸念される国際競争激化への対応が求められている．また，近年の著しい環境変化による収量・品質の不安定から，その高位安定化技術の確立が急務となっている．さらに，農業従事者の減少と高齢化が急速に進む中，これまでに生産現場で蓄積されてきた技術的ノウハウを理論化し，次世代に継承するシステムづくりが重要性を増している．以上の背景から，発表者らは，水田の生産環境，農作業履歴，生育・生体，収量・品質等の種々のデータを活用した生産支援システムの開発に取り組んでいる．

Event date： 2012.9

Presentation type：Oral presentation (general)  

Venue：東北大学（仙台市）   Country：Japan  

近年，食における安全志向の高まりとともに，消費者がその生産方法や流通過程を追跡することができるトレーサビリティが義務化されつつある．また，農業従事者の減少と高齢化が急速に進む中，これまで経験や勘に基づいて行われてきた農作業を，その生産過程を正確に記録することにより，次世代の担い手に伝える取り組みが重要性を増してきている．加えて，我が国の農業は，国際競争の激化，近年の異常気象による収量・品質の不安定などの厳しい状況に置かれており，収量・品質の高位安定化技術の確立が課題となっている．このような状況下，農作業履歴を始めとする種々の情報を管理・分析し，生産者，流通業者および消費者に有益な情報を提供するシステムの開発が求められている．本研究が対象とする福岡県糸島市の米生産については，JA作成の紙媒体の栽培管理表の記録・提出が義務づけられている．しかし，この管理表は，JA側の農薬散布基準の確認，販売先への生産履歴の証明として利用されているだけであり，農家が自らの生産改善に積極的に活用することはない．そこで本研究では，農作業履歴をパソコンで入力し，Webサーバ上のデータベースに蓄積することによって，過去の作業情報を容易に参照でき，収量・品質との関係を分析できる「米づくり情報管理・分析システム」を開発した．

Event date： 2012.9

Presentation type：Oral presentation (general)  

Venue：東北大学（仙台市）   Country：Japan  

近年の水稲生産の課題として，消費者の高品質志向への対応，国際競争力強化，一等米比率の向上が挙げられ，生産現場では収量・品質の高位安定化技術の確立が求められている．目標とする収量・品質の実現には，穂数の制御が極めて重要であるが，その影響因子は，気象・土壌・水の生産環境，肥培・水管理の農家の生産管理と多様であり，それらが複雑に作用している．そのため，穂数の制御は依然として農家の経験に依存する部分が大きく，収量・品質不安定の原因となっている．そこで本研究では，肥培管理の意思決定に援用することを目的として，穂数予測の重回帰モデルを作成した．土壌の交換性アンモニア態窒素（以下，土壌eNH4），水温，日射を説明変数の候補としてモデルを作成するとともに，予測精度の評価結果からモデル改善に向けた課題を検討した．

Event date： 2012.9

Presentation type：Oral presentation (general)  

Venue：東北大学（仙台市）   Country：Japan  

近年，我が国の米生産は，異常気象による一等米比率の低下や国産米の競争力強化の必要性から，収量・品質の高位安定化が求められている．水稲生産技術の向上・安定化において，生育・生産環境のデータに基づいた収量・品質の決定要因の解析は不可欠であり，種々のデータを収集し営農に役立てようとする試みは広く行われている．しかし，生産現場で収集される大量かつ多様なデータから，生産技術の向上に寄与する知見を導き出す体系的な方法が未確立であるため，収集データは十分に活用されていないのが現状である．したがって本研究では，複雑に影響する収量・品質の決定要因を解析する手法として回帰木を適用した．また，要因解析で慣行的に用いられる重回帰分析との比較を行い，その有効性を検討した．

Event date： 2012.9

Presentation type：Oral presentation (general)  

Venue：東北大学（仙台市）   Country：Japan  

我が国の水稲生産は，近年の夏期高温による一等米比率低下への対応，国産米の競争力強化が重要課題となっている．そこで本研究では，収量・品質の高位安定化に資する生産支援技術として，サポートベクターマシンを用いた収量・タンパク質含有率のパターン予測モデルを作成した．まず，作成モデルの予測精度を，収量および玄米タンパク質含有率のパターンの判別率により評価した．続いて，パターン形成条件を明らかにし，その合理性を作物学的見地から考察した．最後に，予測モデルを用いた収量・品質の高位安定化条件提示の可能性について検討した．

Event date： 2012.9

Presentation type：Oral presentation (general)  

Venue：東北大学（仙台市）   Country：Japan  

水稲の生育診断には，草丈，茎数，葉色，SPAD値，乾物重，葉面積指数，窒素吸収量等の種々の生育指標が用いられる．この中で，草丈，茎数，葉色は高価な機器を必要としないことから，慣行的に生産現場で計測されてきた指標である．しかしながら，特に茎数は水田内のばらつきが大きく，目標とする精度で水田の平均値を推定するためには多くの標本を必要とすることから（楠田，1990），調査可能な水田数は限られる．これは，SPAD値やサンプリング調査を必要とする乾物重，葉面積指数，窒素吸収量についても同様である．荒木ら（2005）は，サンプリング調査を必要としない簡易かつ高精度な窒素吸収量の推定法を提案しているが，推定には草丈，茎数，SPAD値の生育調査が必要である．一方，堀尾・紺屋（2007）は，携帯式生育情報測定装置を開発している．この装置は，ほ場一筆のNDVI（正規化植生指数）の代表値を数分で計測でき，NDVIから稲体の窒素吸収量の推定が可能である（佐々木，2007）．しかしながら，NDVIの値は幼穂形成期付近で飽和することから，用途は穂肥の際の生育診断に限られる．すなわち，収量・品質の決定要因の解析等に必要である生育期間を通した生育指標の計測が困難である．さらに，NDVIは植生密度を表す包括的な指標であり，草丈，茎数，葉面積の個々の生育指標を得ることができない．したがって本研究では，生育期間を通した生育指標の計測，水田内のばらつきが大きく調査労力が大きい茎数の推定が可能な計測システムの開発を目的として，PAI（Plant Area Index）を指標とした乾物重および茎数の推定を検討した．

Event date： 2012.8

Presentation type：Oral presentation (general)  

Venue：サンホテルフェニックス（宮崎市）   Country：Japan  

我が国の米生産は，消費者の安全・高品質志向，懸念される国際競争の激化，近年の一等米比率低下への対応が求められている。また，農業従事者の減少と高齢化が急速に進む中，これまで経験や勘に依存してきた農作業を，その生産過程を正確に記録し，次世代の担い手に伝える取り組みが重要性を増している。このような背景から，著者らは農作業履歴をパソコンで入力し，データベースに保存することによって，過去の情報を容易に参照でき，収量・品質と農作業の関係を分析できる「糸島米づくり情報管理・分析システム」の開発を行っている。このシステムは，魅力的なコンテンツを提供することにより，農家の能動的な利用を促すことを開発のコンセプトとしている。昨年度，農家，JA職員，普及センター職員を対象にシステムに関する意見交換会を行ったところ，いもち病対策コンテンツへの要望が多かった。そこで本研究では，越水（1988）による葉いもち発生予察法に基づきプログラムを作成した。また，福岡県前原市のアメダスデータを用いて発生予察を行うとともに，予察基準について考察し，適用予察法を実用する際の問題点を整理した。

Event date： 2012.8

Presentation type：Oral presentation (general)  

Venue：サンホテルフェニックス（宮崎市）   Country：Japan  

水稲生産において，収量・品質の向上・安定化の実現には，穂数の制御が極めて重要である。これまで本研究では，肥培管理作業を支援する数学モデルの開発を目的として，施肥や地力窒素が反映される土壌の交換性アンモニア態窒素（以下，土壌eNH4）および気温，日射，水温を説明変数として，穂数予測のための重回帰モデルを作成してきた。しかし，重回帰モデルは，説明変数間に多重共線性がある場合に回帰係数の推定値が不安定になる。また，説明変数選択に用いられるステップワイズ法においては，基準値（F値）の設定により，選択変数が変動する問題がある。そこで本研究では，上記の問題を解決するために，リッジ回帰を用いて穂数予測モデルを作成した。また，重回帰モデルとの比較により有効性を検討した。

Event date： 2012.8

Presentation type：Oral presentation (general)  

Venue：サンホテルフェニックス（宮崎市）   Country：Japan  

水稲生産において，収量・品質の向上・安定化の実現には，穂数の制御が極めて重要である。これまで本研究では，肥培管理を支援する数学モデルの開発を目的として，施肥や地力窒素が反映される土壌の交換性アンモニア態窒素（以下，土壌eNH4）および気温，日射，水温を説明変数として，穂数予測の線形重回帰モデルを作成してきた。しかし，予測精度は実用レベルを満たしていない現状である。そこで本研究では，非線形回帰手法であるサポートベクトル回帰（以下，SVR）を適用し，その穂数予測モデル作成手法としての有効性を検討した。

Event date： 2012.8

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2011.11

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Event date： 2011.9

Presentation type：Oral presentation (general)  

Venue：弘前市   Country：Japan  

Event date： 2011.9

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Event date： 2011.8

Presentation type：Oral presentation (general)  

Venue：那覇市   Country：Japan  

Event date： 2011.8

Presentation type：Oral presentation (general)  

Venue：那覇市   Country：Japan  

Event date： 2011.8

Presentation type：Oral presentation (general)  

Venue：那覇市   Country：Japan  

Event date： 2011.3

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Event date： 2011.3

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Event date： 2010.9

Presentation type：Oral presentation (general)  

Venue：愛媛   Country：Japan  

Event date： 2010.9

Presentation type：Oral presentation (general)  

Venue：愛媛   Country：Japan  

Event date： 2010.9

Presentation type：Oral presentation (general)  

Venue：愛媛   Country：Japan  

Event date： 2010.9

Presentation type：Oral presentation (general)  

Venue：愛媛   Country：Japan  

Event date： 2009.8

Presentation type：Oral presentation (general)  

Venue：佐賀市   Country：Japan  

Event date： 2009.8

Presentation type：Oral presentation (general)  

Venue：佐賀市   Country：Japan  

Event date： 2009.8

Presentation type：Oral presentation (general)  

Venue：佐賀市   Country：Japan  

Event date： 2009.8

Presentation type：Oral presentation (general)  

Venue：佐賀市   Country：Japan  

Event date： 2009.3

Venue：つくば市   Country：Japan  

Event date： 2008.8

Venue：熊本市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：宮崎市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：Tampa, Florida   Country：Japan  

Presentation type：Oral presentation (general)  

Country：United States  

Presentation type：Oral presentation (general)  

Venue：宮崎市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：さいたま市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：さいたま市   Country：Japan  

Presentation type：Oral presentation (general)  

Country：United States  

Presentation type：Oral presentation (general)  

Country：China  

Presentation type：Oral presentation (general)  

Presentation type：Oral presentation (general)  

Venue：岩手市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：諫早市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：佐賀市   Country：Japan  

Presentation type：Oral presentation (general)  

Country：Czech Republic  

Presentation type：Oral presentation (general)  

Country：Japan  

Presentation type：Oral presentation (general)  

Country：Korea, Republic of  

Presentation type：Oral presentation (general)  

Venue：熊本市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：新潟市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：鹿児島市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：佐賀市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：山形市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：札幌市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：宮崎市   Country：Japan  

Presentation type：Symposium, workshop panel (public)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：宮崎市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：鹿児島市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：鹿児島市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：宮崎市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：宮崎市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：宮崎市   Country：Japan  

Presentation type：Oral presentation (general)  

Country：Korea, Republic of  

Presentation type：Oral presentation (general)  

Venue：神戸市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：宮崎市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：さいたま市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：さいたま市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：さいたま市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：岩手市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：諫早市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：佐賀市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：鳥取市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：鳥取市   Country：Japan  

Type：Competition, symposium, etc. 

Number of participants：80

Type：Academic society, research group, etc. 

Type：Competition, symposium, etc. 

Number of participants：100

Type：Competition, symposium, etc. 

Number of participants：400

Type：Competition, symposium, etc. 

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：1

Number of peer-reviewed articles in Japanese journals：2

Type：Competition, symposium, etc. 

Number of participants：100

Type：Competition, symposium, etc. 

Number of participants：250

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：2

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：2

Number of peer-reviewed articles in Japanese journals：1

Type：Competition, symposium, etc. 

Number of participants：100

Type：Competition, symposium, etc. 

Number of participants：150

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Number of participants：300

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Type：Competition, symposium, etc. 

Number of participants：250

Type：Competition, symposium, etc. 

Number of participants：30

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Number of participants：40

Type：Competition, symposium, etc. 

Type：Lecture

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture

Type：Lecture

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Audience： Infants,　Schoolchildren,　Junior students,　High school students

Type：Seminar, workshop

Type：Seminar, workshop

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture