Abstract

                                To evaluate the effect of recommended dose of fertilizers and Parthenium and Chromolaena as green manures and their compost incorporation on paddy yield and its nutrition, field experiment was conducted during kharif 2006 in sandy soil at Chickmagalur district of Karnataka state in farmers field. The field experiment was laid out in random complete block design with three replication and ten treatment combinations. Combined application of recommended dose of fertilizer in combination with chromolaena compost @ 7.5 t/ha recorded significantly higher grain yield as compared to rest of the treatments. The increase in the grain yield is by about 88.42 per cent over control. Significant differences in all the chemical properties of post harvest soil were observed due to application of recommended dose of fertilizers and different levels of organic manures. The net return and benefit cost ratio due to application of recommended dose of fertilizer in combination with chromolaena compost @ 7.5 t/ha was Rs.39957 and 2.29 respectively and recommended dose of fertilizer in combination with Parthenium compost @ 7.5 t/ha Rs.38274 and 2.22 respectively

Key words : Paddy, Chromolaena, Parthenium, compost, yield, nutrient, economics.