Effect of organic sources of nutrients on performance of soybean (Glycine max)

A field experiment was conducted at the Research Farm of ICAR-Indian Institute of Soil Science, Bhopal, India to study the effect of different combinations of organic inputs on performance of soybean [Glycine max (L.) Mem]. Soybean (cv. JS 335) was grown in a randomized block design with seven treatments and four replications. The treatments studied were organic manure (OM) (T-1); biodynamic preparation (BD) (T-2); OM+panchagaiya (OM+PG) (T-3); OM+BD (T-4); OM+PG+BD (T-5 ); control (T-6); and recommended dose of fertilizers (RDF) (T-7). The results of the study revealed that, the treatments with organic manures either alone or in combination with panchagavya and/or biodynamic application improved the performance of soybean crop. The yield of soybean was found comparable and even better (higher 5-13%) with those obtained under RDF, which enhanced nutrient removal by soybean crop by 5-13% with organic combinations. Similarly, the application of organic manures significantly improved the available nutrient status of soil and showed 19-22% and 28-33% higher available N and P, respectively than RDF. Soil enzyme activities, viz. dehydrogenase and alkaline phosphatase increased by 62-72% and 27-35%, respectively under the treatments receiving organic source of nutrients over RDF.