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- W2363339237 abstract "According to statistics, the farmland nutrients balance from 1985 to 1999 in Qianwei county are discussed. The result showed that in 1990's, the nitrogen in farmland changed from equilibrium to surplus, about 20 percent at present time; the content of phosphorus varied from deficiency to surplus, over 50 percent now; the potassium was deficient all along with high proportion, the deficit is over 50 percent. And the regulating ways relevant to changing construction of fertilizer in farmland was given, such as control nitrogen, changing the using ways of phosphorus, etc." @default.
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- W2363339237 date "2002-01-01" @default.
- W2363339237 modified "2023-09-25" @default.
- W2363339237 title "Study on the Farmland Nutrients Balance and the Dynamic Variation Tendency of Soil Nutrients in Qianwei County" @default.
- W2363339237 hasPublicationYear "2002" @default.
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