STUDIES ON ROLE OF CHEMICAL AND ORGANIC FERTILIZER IN PROMOTING THE FERTILITY OF YELLOW FLUVO-AQUIC SOILS
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Abstract:
The regression analysis results of raft of ferrtilizer,amount uptaken by crops and accumulation of soil nutrients in the localized trial of fertilizers on wheatcorn on yellow fluvo-aquic soils during 1981-1986 showed that 8.76% of chemical fertilizer-N and 42.54% of organic fertilizer-N entered into soil N pool,17.61% of chemical fertilizer-P and 17.20% of organic fertilizer-P into soil available P pool,and 4.5% of chemical fertilizer-K and 2.3% of organic fertilizer-K into soil available K pool.Chemical fertilizers tended to increase in organic matter content of the soils,While significantly good effect of organic fertilizers was found on supplementing soil nutrients such as P and K and improving soil physical properties.Combined application of chemical and organic fertilizers was effective both in promoting soil fertility and raising crop yield.
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