Physiological Parameters, Nodulation and Yield in Soybean(Glycine max L.) as Influenced by Organic Manures and Fertility Levels

A field experiment was conducted during the kharif 2010 at the Experimental Farm of Department of Seed Science and Technology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur. The experiment aimed to study the effect of organic manures and fertility levels on growth, physiological parameters, nodulation and yield of soybean seed. The field experiment consisted of twelve treatment combinations of four organic manures and three fertility levels. The results indicated that application of FYM @2.5 t ha^-1 + vermicompost@ 1.25 t ha^-1 and recommended dose offertilizers (100% RDF) resulted in highest dry matter accumulation (297.45 gm^-2 and 313.30 gm^-2, respectively), leaf area index (5.67 and 5. 77, respectively), maximum nodules number and weight at both flowering and pod formation stage. The combined application of FYM @ 2.5 t ha^-1 + vermicompost @ 1.25 t ha^-1 and 100% RDF resulted in significantly highest crop growth rate and leaf area duration. The use of FYM@ 2.5 t ha^-1 + vermicompost @ 1.25 t ha^-1 resulted in significantly highest seed (1815 kg ha^-1) and straw yield (3253 kg ha^-1) as compared to alone application of vermicompost@ 2.5 t ha^-1 and FYM@ 5 t ha^-1.100 % RDF resulted in significantly highest seed (1585 kg ha^-1) and straw yield (3138 kg ha^-1) as compared to 50 % RDF and control treatment.