STUDIES ON PERFORMANCE OF ORGANIC FARMING AND CHEMICAL FARMING IN RAINY SEASON RICE

ABSTRACT: Field experiments conducted consecutively for four years during kharif 2007 to 2010 on Godavari alluvial soils with five exclusive organic farming practices, one integrated nutrient management practice (INM) and 100percent recommended dose of fertilizer (RDF) with an objective to study the performance of organic farming practices in comparison with INM and RDF. The four years pooled results revealed that, application of 100% recommended NPK along with Zn so 4 @50 kgha -1 resulted the higher tillers, yield attributes, root growth ,grain yield, returns, and more sustainability in yields over exclusive organic farming practices and found at par to integrated nutrient management practice . Milling parameters and grain quality parameters were significantly influenced by source of nutrition. Incidence of blast, infestation of stemborer and brown plant hopper were markedly higher in application of 100% recommended NPK along with Zn so 4 @50 kgha -1 followed by integrated use of 50% NPK + 50% N as FYM compared to exclusive organic practices. The Organic carbon content was conspicuously increased with all the exclusive organic nutrient management practices as well as integrated use of nutrients. The status of available soil potassium was remarkably decreased in all the nutrient management practices regardless of source of nutrition