| Budget Amount *help |
¥47,970,000 (Direct Cost: ¥36,900,000、Indirect Cost: ¥11,070,000)
Fiscal Year 2010: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2009: ¥14,950,000 (Direct Cost: ¥11,500,000、Indirect Cost: ¥3,450,000)
Fiscal Year 2008: ¥25,220,000 (Direct Cost: ¥19,400,000、Indirect Cost: ¥5,820,000)
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| Research Abstract |
Under an intensive fertilization system in the arable lands, a great amount of P sources has been accumulated and fixed in the soil as an organic P (phytin) and insoluble P as Al-, Feand Ca-P. The potential of crop to solubilize and absorb the soil P should be defined in order to establish the sustainable crop productivity in these agricultural lands. In the present study, we showed possibility of acquisition of these P compounds in several crops such as corn, peanut and sesbania and also evaluated the P and N supply potentials of leguminous crops associated with rhizobia as green manures to the succeeding crop.
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