Veerabhadraiah, T.N., Chame gowda, T.C. and Badrinath, M.S. Dept. of Soil Science and Agricultural Chemistry, UAS, GKVK, Bangalore, India.
A field experiment was conducted at Taridalu village, Gowribidanur taluk during Rabi season of 2005, on sandy clay loam soil to study the effect of organic sources of nutrients viz. FYM, compost and vermicompost along with inorganic fertilizers with and without Rhizobium on avilabality and uptake of major and secondary nutrients by French bean in eastern dry zone of karnataka. Application of organic manures recorded improved soil properties where as application of compost @ 25 t ha-1 + RDF(Recommended Dose of Fertilizer @ 62.5:100:75 kg ha-1 )found to be superior compare to FYM and vermicompost.Addition of compost @ 25 t ha-1 + RDF with or without Rhizobium registered significant values of available nitrogen (212.7 kg ha-1), phosphorus (32.6 kg ha-1) and potassium (182.8 kg ha-1) where as maximum values of exchangeable calcium and magnesium was (18.90 and 7.09 c.mol (p+) kg) found in vermicompost and available sulphur (36 ppm) in compost @ 25 t ha-1 + RDF + Rhizobium treatment. Uptake of nitrogen and phosphorus were significant and highest in compost @ 25 t ha-1 + RDF treatment and potassium in FYM @ 25 t ha-1 + RDF treatment. Maximum values of calcium and magnesium were recorded in treatment received compost @ 25 t ha-1 alone, where as the sulphur uptake was found to be maximum in treatment received only RDF alone.