Effect of Long Term Fertilizer and Manure Application on Physical Properties and Yield of Soybean (Glycine max) and Safflower (Carthamus tinctorius) in Vertisole

Abstract:

The present study was undertaken during 2020-21 in an ongoing long-term fertilizer experiment initiated during 2006-2007 at Vasantrao Naik Marathwada Agricultural University, Parbhani with fertilizer and manure applications to assess the impact of long-term fertilization on soil chemical properties, nutrient availability and yield of soybean-safflower cropping sequence in Vertisols (Typichaplusterts) having 12 treatment framed in a randomized block design (RBD). The result indicated that application of FYM and chemical fertilizer, i.e., chemical properties of soil such as pH and EC, reduced with the application of inorganic fertilizer in conjunction with organic100 % NPK +FYM @5 t ha-1and only FYM@ of 10 t ha-1 treatment. At the same time, highest pH and EC were recorded in 150 % NPK and 100% NPK + ZnSO4 treated plot. Organic carbon in soil significantly improved with the combined application of organic manure with inorganic fertilizer100% NPK + FYM @ 5 t ha-1 and lowest at treatment control and N alone treated plot. Cation exchange capacity of soil significantly improved in treatment, receiving 100 % NPK+ FYM @ 5 t ha-1and minimum CEC was recorded at treatment control. Major soil nutrients like Nitrogen, Phosphorus, and Potassium and Sulphur availability increased with the integrated use of chemical fertilizer with FYM, i.e. 100% NPK+ FYM 5t ha-1, followed by treatment receiving 150% NPK over the other treatment. The DTPA micronutrient like Zn, Fe, Mn and Cu were maximum recorded on receiving 100% NPK + FYM @ 5t ha-1except Zn maximum were noted in treatment receiving 100 % NPK +ZnSO4 25 kg ha -1 and at par with 100% NPK + FYM and lowest at treatment control except iron lowest at treatment receiving imbalance supply nutrient 100 % N alone. The maximum grain and straw yield of soybean and safflower crop under soybean – safflower cropping sequence was recorded in 100% NPK + FYM @5 t ha-1 plot followed by treatment receiving 150% NPK. Continuous application N alone adversely effect on yield of soybean – safflower cropping sequence. Among the various treatments, the application of NPK + FYM proved superior, which had not only better chemical properties but also the nutrient availability and yield of soybean – safflower cropping sequence in Vertisol.