| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Though predicting and controlling field soil moisture are required to assure a stable yield and the high quality of products, proper numerical model for predicting soil moisture in croplands especially under high soil moisture conditions is still under discussion. Here we evaluated a numerical model for predicting soil moisture in converted soybean fields. A soybean-growing experiment with a converted field model was conducted and spatial and temporal variation of soil moisture was monitored. Then a numerical simulation of soil water movement for this growing experiment was conducted with the HYDRUS-1D model. The simulation results improved with the consideration of root distribution variation, changes in evapotranspiration rate and LAI values.
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