Residual Effect of Integrated Nutrient Management with Coir Pith Compost and Other Organics on Subsequent Ragi Crop Yield and Chemical Properties of Vertisols

摘要

In field experiment the residual effect of coir-pith-based compost (CPBC) with organics and inorganics was studied over a period of five years. Application of CPBC with pressmud (PM) and 100% recommended dose of fertilizer (RDF) produced significantlyhigher grain (3.75 t ha~(-1)) and straw yield (7.60 t ha~(-1)) of ragi crop and recorded significantly higher available N (257 kg ha~(-1)), P (14.3 kg ha~(-1)) and S (67.0 mg kg~(-1)) in the soil. Whereas, available K (147 kg ha~(-1)) and Ca [20.3 cmol(p~+)kg~(-1)] was found to be high in farmyard manure (FYM) with 100% RDF applied treatment over five years. The Mg availability [10.5 cmol(p~+)kg~(-1)] was high in CPBC with green manure and 100% RDF applied treatment. The Fe and Cu were high in CPBC with copper ore tailings (COT) and 100% RDF-treated plot, whereas CPBC with PM and 100% RDF applied treatment recorded high Zn availability.