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physico-chemical properties and productivity of a nigerian typic-haplustult amended with fresh and burnt rice-mill wastes.in order to arrest the declining productivity of the soils in the abakaliki agro-ecological zone of s.e. nigeria, four levels (12.5, 25.0, 37.5 and 50.0 mg ha-1) of fresh (fw) and burnt (bw) rice-mill wastes abundant in the area, and a mixture of the waste + npk and npk alone were added to the soil (typic-haplustult) to evaluate their immediate and residual effects on the productivity of the soil using maize (zea mays l.) as a test crop. results showed a significant reduction in bulk density as ...200111198180
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