Vol. 11, Issue 9 (2022)

Author(s):
PH Rathod, SM Bhoyar, SD Jadhao, PW Deshmukh, GS Lahariya and DP Deshmukh

Abstract:
The present investigation was conducted on long term sorghum-wheat under cropping sequence to know the soil nutrient status and crop productivity during 2019-20 and 2020-21. Experiment was carried out at research farm department of soil science and agricultural chemistry Dr. PDKV, Akola. Results of experiment revealed that conjoint used of NPK along with FYM accounted the highest grain and fodder yield of sorghum crop under long term cropping sequence of 33^rd cycle. Whereas, decline in yield potential of cropping system was observed over the initial crop productivity as result of 100% N alone and 100% NP imbalanced and continuous use of inorganic fertilizers. Balanced fertilization with macro and micronutrients it showed getting 15-25 higher yield over the omission of K, S and Zn from nutrient management practices leads it reflecting into sustainability of crop yields. There was significant effect on soil pH and EC was observed. Whereas, the lowest pH was observed with sole FYM in as result of continuous used as a source of nutrients. Moreover, with respect to other treatment there was no drastic effect as a result of buffering effect of soil colloid. Significantly highest OC was noted with application of FYM @ 10 t ha^-1 and it was statistically at par with NPK+FYM and 150% NPK and lowest was observed under control. The availability of N,P,K, were significantly higher with the application of NPK along with FYM @ 5 t ha^-1 which was on par with the used of 150% NPK and lowest available nutrient status was noticed under control treatment. Similarly in terms of DTPA-extractable micronutrients status were recorded with continuous application of FYM as source of nutrients which was significantly higher over the rest of treatments. The soil fertility status is significantly influenced by the balanced fertilization with NPK along with FYM followed by super optimal dose of NPK fertilization over the optimal and sub-optimal fertilization of nutrients. Whereas, the degradation in soil fertility and crop productivity were observed under continuous inorganics, imbalanced fertilization, exclusion of FYM and control cultivation.