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Hirai Yasumaru Last modified date:2018.09.14

Associate Professor / Bioproduction Environmental Sciences
Department of Agro-environmental Sciences
Faculty of Agriculture


Graduate School


E-Mail
Homepage
http://www-mech.bpes.kyushu-u.ac.jp/
Laboratory of Bioproduction Engineering Homepage .
Phone
092-642-2956
Fax
092-642-2956
Academic Degree
Agriculture
Field of Specialization
Agricultural Information
Outline Activities
Research
Decision support system to optimize soil fertility management and fertilizer application in rice production
Decision support system for the application of manure locally produced to the cultivation of whole crop rice silage

Education
1.Numerical analysis
2.Data mining methods
3.Measurement system engineering
4. Science English II
5. Agri-Food Production System Engineering(G30)
6. Advanced Agricultural Information
7. Bioproduction and Environmental Sciences
8. Bioproduction and Environmental Sciences(国際開発コース)
9. Advanced Studies of Bioproduction Environment Science I
10 Advanced Studies of Bioproduction Environment Science Ⅱ
11. Proseminar in Bioproduction Environment Science
12. Core Seminar (G30)

Research
Research Interests
  • Development of farmer’s decision-making support system in rice production
    In Japanese rice production, it is required to deal with the necessity of enhancing the international competitive power, unstable yield and quality due to global environmental change, and high demands of consumers about rice quality. Further, it is urgent subject to succeed to rice production technology, which has been accumulated for a long time, to the next generation, while decrease and aging in farmers have been accelerating. This situation indicates that technology in rice production should be further sophisticated and systemized by introducing production support using numeral data into conventional experience-based technology.
    From these backgrounds, we have been developing collection systems of various data in rice production, such as production environment, production management, rice growth and nutrition condition, and yield and quality, and farmer’s decision-making support system by efficient use of collected data. Ongoing research subjects are listed below.

    1. Estimation methods for tiller number, plant area index, dry matter weight, nitrogen content in leaf blade and nitrogen uptake of rice plant
    2. Prediction of outbreak on rice blast
    3. Analytical methods to identify determinants of rice yield and quality
    4. Development of diagmosis system for rice production
    keyword : rice, farmer's decision-making support system, agricultural information, mathematical model
    2006.04Development of a farmer’s decision support system for rice production in the mountainous area In the current rice production, it is required to support farmer’s decision taking into considerations various strategies of individual farmers, farming community and farming corporation; that is, working efficiency, added values of product, environmental impacts and energy input. The research has been carried out in the rice terrace region located in Hoshino village, Fukuoka prefecture (mountainous area). We aim to develop a farmer’s decision support system for rice production which takes into consideration yield, quality, income, environmental impacts (green house gas emissions, water environment), the use of regional resource and energy input. Further, when the support system is used in a field, it is indispensable to acquire various information regarding rice production in a field. Therefore, sensors and monitoring system to acquire agricultural information is also developed for the practical use in a field..
Academic Activities
Reports
1. I stayed to study in Kansas from 2004 to 2006. Kansas is known as a grain belt and the Great plains spread out there. I often visited my supervisor’s farm during this period, and soaked in a farm life there. Through the stay, agriculture has grown on me. The title of this manuscript “What I found in Kansas” comes from words told by my supervisor’s wife. “We had many visitors on this farm. Here is a very rural area, and some visitors just feel bored in this environment. But, some visitors find something even in this rural farm. I’m glad that you seem to have found something.” My experience on the farm is described in this manuscript..
Papers
1. Ryuichi YOSHIZAKI, Yasumaru HIRAI, Eiji INOUE, Takashi OKAYASU, Muneshi MITSUOKA, Relationships between Bulk Density and Particle Density of Rough Rice Piled in a Vertical Cylinder, Journal of the Japanese Society of Agricultural Machinery and Food Engineering, 80, 5, 280-288, 2018.09.
2. Borin Khem, Yasumaru Hirai, Takeo Yamakawa, Yuki Mori, Eiji Inoue, Takashi Okayasu, Muneshi Mitsuoka, Effects of different application methods of fertilizer and manure on soil chemical properties and yield in whole crop rice cultivation, Soil Science and Plant Nutrition, 10.1080/00380768.2018.1443399, 64, 3, 406-414, 2018.06.
3. Ryuichi Yoshizaki, Yasumaru Hirai, Muneshi Mitsuoka, Shio Inagaki, Eiji Inoue, Takashi OKAYASU, Relationships between Mass and Porosity of Rough Rice Piled in a Combine Grain Tank, Proceedings of the 9th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 618-623, 2018.05.
4. Yasumaru Hirai, Takeo Yamakawa, Eiji Inoue, Takashi OKAYASU, Muneshi Mitsuoka, Analysis of high-yield conditions using a rice yield predictive model, The International Conference on Precision Agriculture, 2016.07.
5. Yasumaru Hirai, Kodai Tanaka, Tsuneo Nakanishi, Takeshi Shikanai, Eiji Inoue, Takashi OKAYASU, Muneshi Mitsuoka, Measurement accuracy of the area of combine-harvested field sections
corresponding to a truckload of grain received at a grain elevator, Engineering in Agriculture, Environment and Food, 2017.07.
6. Mao Ogata, Yasumaru Hirai, Tsuneo Nakanishi, Takeshi Shikanai, Eiji Inoue, Takashi OKAYASU, Muneshi Mitsuoka, Accuracy evaluation of a method to compute the area of combine-harvested field sections, Proceedings of the 8th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 598-602, 2016.05.
7. Soichiro Iwasaka, Yasumaru Hirai, Takeo Yamakawa, Eiji Inoue, Takashi OKAYASU, Mitsuoka Muneshi, Accuracy of Rice Straw Weight and Rough Grain Yield Predicted by a Modified Crop Growth Model Based on SUCROS1, Proceedings of the 8th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 592-597, 2016.05.
8. Yasumaru Hirai, Yuta Nakamura, Atsushige Sakai, Takashi OKAYASU, Eiji Inoue, Mitsuoka Muneshi, Evaluation of a method to estimate light-intercepting characteristics of a rice hill using a RGB-DEPTH sensor
, Proceedings of the 8th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 483-494, 2016.05.
9. Tsuneo Nakanishi, Yasumaru Hirai, Kodai Tanaka, A device and an algorithm to compute the harvested area from the moving trace of the combine harvester, Proceedings of the 7th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 347-353, CD-ROM, 2014.05.
10. Yasumaru Hirai, Kodai Tanaka, Tsuneo Nakanishi, Takeshi Shikanai, Eiji Inoue, Akira Fukuda, Takashi OKAYASU, Mitsuoka Muneshi, Evaluation of measurement accuracy of the harvest area corresponding to each shipment to country elevator using GPS and QZSS, Proceedings of the 7th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), 995-999, CD-ROM, 2014.05.
11. 猿田恵輔, Hirai Yasumaru, 田中恒大, Eiji Inoue, Takashi OKAYASU, Mitsuoka Muneshi, Predictive models for yield and protein content of brown rice using support vector machine, Computers and Electronics in Agriculture, 10.1016/j.compag.2013.09.003, 99, 93-100, 2013.09.
12. Yasumru Hirai, Saruta Keisuke, Kunihiko Hamagami, Evaluation of an analytical method to identify determinants of rice yield components and protein content, Computers and Electronics in Agriculture, 10.1016/j.compag.2012.02.001, 83, 77-84, 2012.04.
13. Kunihiko HAMAGAMI, Ken Mori, Shota Iguchi, Yasumaru Hirai, Response Characteristics of Internal Wave to Wind Stress in a Shallow Closed Water Body, J. Fac. Agr., Kyushu Univ., 56, 1, 123-128, 2011.02.
14. Estimation of inorganic nitrogen concentration in irrigation water using electrical conductivity measurements.
15. Field-use oriented Model for Estimation of Diurnal Variation of Water Temperature
in a Paddy Field.
16. Survey of working hours, production costs, and income associated with rice production in rice terraces.
17. Yasumaru Hirai, Kenzo Kawai, Marika Mouri, Yuki Mori, Kunihiko Hamagami, Feasibility Study on Electrical-conductivity-based Field Measurement of Inorganic Nitrogen Concentration in Irrigation Water , Proceedings of International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), CD-ROM, 2010.04.
18. Production Environment in the Rice Terraces of Hoshino Village, Fukuoka Prefecture.
19. Effects of Nitrogen Supply from Irrigation Water on Rice Production.
20. Yasumaru Hirai, Kunihiko Hamagami, Effects of Air Temperature, Nitrogen Concentration in Irrigation Water, and Cultivation Practices on Rice Production in the Rice Terrace Region, J. Fac. Agr., Kyushu Univ., 54, 2, 305-311, 2009.11.
21. Evaluation of the Fertilizer Characteristics of Nitrogen in Liquid Compost by Rice Cultivation in Pots.
22. Yasumaru Hirai, Yuichiro Beppu, Kunihiko Hamagami, Ken Mori, Regional-Scale Estimation of Rice Production Environment
in the Mountainous Area, Proceedings of the 4th International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB), CD-ROM, 2008.05.
23. Yasumaru Hirai, Yuichiro Beppu, Yuki Mori, Keiko Tomita, Kunihiko Hamagami, Ken Mori, Principal Component Analysis of Rice Production Environment in the Rice Terrace Region, Proc. 9th International Conference on Precision Agriculture, CD-ROM, 2008.08.
24. Yasumaru Hirai, Kengo Tagami, Kunihiko Hamagami, Susumu Uchida, Shigeki Inaba, Ken Mori, Evaluation of Environment on Rice Production for the Rice Terraces in Hoshino Village, J. Fac. Agr., Kyushu Univ., 53(1), 95-100, 2008.02.
25. Yasumaru Hirai, Kunihiko Hamagami, Ken Mori, Investigation of a Laser Scanner for Measurement of Lodging Posture of a Wheat Bunch, J. Fac. Agr., Kyushu Univ., 53(1), 89-93
, 2008.02.
26. Technical know-how to produce environmental monitoring equipment using a solar battery.
27. Y. Hirai, K. Mori, A. Ozaki, K. Hamagami, Experimental Study for Wind Velocity profiles in and around a rice canopy at different growing stages, Journal of the faculty of agriculture, Kyushu University, 2007.01.
28. Y. Hirai, M. D. Schrock, D. L. Oard, T. J. Herrman, Delivery System of Tracing Caplets for Wheat Grain Traceability, Applied Engineering in Agriculture, 22(5), 747-750, 2006.01.
29. Y. Hirai, M. D. Schrock, D. Maski, R. K. Taylor, Loss Evaluation of Soybean Harvesting on Four Types of Headers, Agricultural Equipment Technology Conference, Louisville, Kentucky, ASAE Pub #AETC05020, 2005.02.
30. Y. Hirai, M. D. Schrock, D. L. Oard, T. J. Herrman, A “Proof of Concept” Delivery System for Grain Tracing Caplets on the Combine, ASAE Annual International Meeting, Tampa, Florida, ASAE Pub #056029, 2005.07.
31. Y. Hirai, E. Inoue, K. Mori, Application of a Quasi-static Stalk Bending Analysis to the Dynamic Response of Rice and Wheat Stalks gathered by a Combine Harvester Reel, Biosystems Engineering, 10.1016/j.biosystemseng.2004.04.010, 88, 3, 281-294, Vol.88, No.3, pp.281-294, 2004.01.
32. Y. Hirai, E. Inoue, M. Matsui, K. Mori, K. Hashiguchi, Reaction Force of a Wheat Stalk Undergoing Forced Displacement, 農業機械学会誌, Vol.65, No.2, pp.47-55, 2003.03.
33. Y. Hirai, E. Inoue, K. Mori, Reaction Force of Wheat Stalks during the Reel Operation of a Combine Harvester, The International Conference on Crop Harvesting and Processing, Louisville, Kentucky, ASAE Pub #701P1103e, 2003.02.
34. Y. Hirai, E. Inoue, M. Matsui, K. Mori, K. Hashiguchi, Reaction Force and Posture of a Bunch of Wheat Stalks Undergoing Forced Displacement, Vol.65, No.2, pp.56-63, 2003.03.
35. Y. Hirai, E. Inoue, K. Mori, Numerical Analysis of the Reaction Force of a Single Rice Stalk undergoing Forced Displacement, Biosystems Engineering, 10.1016/S1537-5110(03)00132-6, 86, 2, 179-189, Vol.86, No.2, pp.179-189, 2003.11.
36. Y. Hirai, E. Inoue, T. Fukushima, I. Ueka, K. Mori, Analysis of the Reaction Force of a Bunch of Rice Stalks undergoing Forced Displacement, Journal of the faculty of agriculture, Kyushu University, 48, 1-2, 175-186, 48(1∙2), pp.175-186, 2003.01.
37. Y. Hirai, E. Inoue, K. Mori, K. Hashiguchi, Investigation of Mechanical Interaction between a Combine Harvester Reel and Crop Stalks, Biosystems Engineering, 10.1016/S1537-5110(02)00176-9, 83, 3, 307-317, Vol.83, No.3, pp.307-317, 2002.11.
38. Y. Hirai, E. Inoue, K. Mori, K. Hashiguchi, Analysis of Reaction Forces of a Single Rice Stalk during Gathering Operations, The International Agricultural Engineering Conference (Asian Association for Agricultural Engineering), Wuxi, China, pp.366-371, 2002.11.
39. Y. Hirai, E. Inoue, K. Mori, K. Hashiguchi, Analysis of Reaction Forces and Posture of a Bunch of Crop Stalks during Reel Operations of a Combine Harvester, the CIGR Journal of Scientific Research and Development (CIGR electronic journal), Vol.IV, 2002.01.
40. Mechanical properties of rice and wheat stalks during reel operations were investigated for the purpose of improving performance of harvesting in terms of mechanical interaction between a combine harvester reel and crops. Reaction forces in horizontal and vertical directions were measured as a bunch of rice and wheat stalks were deflected. Also, reaction forces deflected by forced displacements were analyzed numerically based on the mechanical model of crop stalk..
41. Y. Hirai, E. Inoue, K. Mori, K. Hashiguchi, Examination of Mechanical Properties of Crop Stalks in Reel Operations, International Conference on “Physical Method in Agriculture –Approach to Precision and Quality-” (International Society of Agromaterials Science and Engineering), Prague, Czech Republic, pp.123-126, 2001.08.
42. Dynamic characteristics of a rice stalk were examined in order to clarify mechanical interaction between crop stalks and a combine reel, and obtain design parameters of a reel for the improvement accuracy and efficiency in harvesting operations. Frequency response charactersitics (amplitude ratio against a shaking frequency) and natural frequency of a rice stalk were investigated by the forced vibration experiment using a shaker. Also, Rayleigh method was applied to the analysis of natural frequency of a rice stalk having variety sectional area, and validity of the method was discussed by comparing with experimental results..
43. Yasumaru Hirai, Eiji Inoue, Koichi Hashiguchi, Choe Jung-Seob, Takashi Okayasu, Tomoko Kuwano, Examination of Mechanical Model for Crop Stalks in Harvesting, 農業機械学会九州支部誌, Vol.49, pp.7-11, 2000.12.
44. Y. Hirai, E. Inoue, K. Hashiguchi, Y. Kim, S. Inaba, K. Tashiro, Examination of Calculation Method for Flexural Rigidity of Crop Stalks, 3rd International Conference on Agricultural Machinery Engineering (Korean Society for Agricultural Machinery), Vol.2, pp.287-294, 2000.11.
Presentations
1. Khem Borin, Yasumaru Hirai, Takeo Yamakawa, Yuki Mori, Eiji Inoue, Takashi Okayasu, Muneshi Mitsuoka, Nitrogen balance in a paddy field cultivated with whole crop rice using cow manure and chemical fertilizer, システム農学会2016年度春季大会, 2016.05.
2. Khem Borin, 平井 康丸, 山川 武夫, 森 裕樹, 井上 英二, 岡安 崇史, 光岡 宗司, Effects of manure application on soil fertility and potential nitrogen supply
in the production of rice for whole crop silage
, 第69回農業食料工学会九州支部例会, 2015.08.
3. Khem Borin, 平井 康丸, 山川 武夫, 森 裕樹, 井上 英二, 岡安 崇史, 光岡 宗司, Effects of manure application on growth and yield of rice for whole crop silage, 日本土壌肥料学会 , 2014.09.
4. Khem Borin, 平井 康丸, 山川 武夫, 森 裕樹, 井上 英二, 岡安 崇史, 光岡 宗司, Nitrogen balance in the production of rice for whole crop silage, 第68回農業食料工学会九州支部例会, 2014.09.
5. Hirai Yasumaru, Khem Borin, Takeo Yamakawa, Yuki Mori, Eiji Inoue, Takashi OKAYASU, Mitsuoka Muneshi, EFFECTS OF MANURE APPLICATION ON YIELD, SOIL FERTILITY AND NITOROGEN BALANCE IN THE PRODUCTION OF RICE FOR WHOLE CROP SILAGE, SOWAC Project 2014, 2014.08.
6. Hirai Yasumaru, Yusaku YAMAUCHI, Eiji Inoue, Takashi OKAYASU, Mitsuoka Muneshi, MULTIPLE LINEAR REGRESSION MODEL FOR THE PREDICTION OF PANICLE NUMBER IN RICE

, SOWAC Project 2013, 2013.08.
7. Hirai Yasumaru, Yusaku YAMAUCHI, Takeo Yamakawa, Eiji Inoue, Takashi OKAYASU, Mitsuoka Muneshi, MULTIPLE LINEAR REGRESSION MODEL FOR THE PREDICTION OF PANICLE NUMBER IN RICE
, SOWAC Project 2012, 2012.08.
8. Study on Growth Diagnosis of Rice Using Patterns of Growth Change.
9. クラスター分析を用いた水稲の収穫物評価法の検討.
10. Examinations of Cultivation Methods for Rice in the Downstream Paddy Field of Tea Fields in the Mountainous Area.
11. Evaluation of Environment on Rice Production for the Rice Terraces
in Hoshino Village.
12. Distribution of wind velocity around rice stems at different growing stages.
13. Research on grain traceability.
14. A monitoring system for Rice production environment in Hoshino village.
15. Experience note on Agriculture in the U.S. 2004-2006.
16. Measurement system for lodging of wheat stalks using a laser sensor.
Membership in Academic Society
  • Japanese Society of Soil Science and Plant Nutrition
  • Japanese Society of Agricultural Informatics
  • Agricultural Systems Society
  • The Crop Science Society of Japan
  • The Japanese Society of Agricultural Machinery and Food Engineering
Awards
  • Informatization of water environment in a paddy field
Educational
Educational Activities
Undergraduate Course
1.Numerical analysis
2.Data mining methods
3.Measurement system engineering
4. Science English II
5. Agri-Food Production System Engineering(G30)
12. Core Seminar (G30)

Master Course
6. Advanced Agricultural Information
7. Bioproduction and Environmental Sciences
8. Bioproduction and Environmental Sciences(国際開発コース)
9. Advanced Studies of Bioproduction Environment Science I
10 Advanced Studies of Bioproduction Environment Science Ⅱ
11. Proseminar in Bioproduction Environment Science