Rajashekarappa, K SDEVAPPA2023-01-142023-01-142022-12-08Th-13375https://krishikosh.egranth.ac.in/handle/1/5810192223“ in-situ green ” conducted during Kharif 2021 at AICRP for Dryland Agriculture, UAS, Bangalore. The experiment was laid out in split plot design with three each main plots on different conservation tillage and sub plots of in-situ green manuring practices replicated thrice. Among different conservation tillage, conventional tillage M1-1 Ploughing + 2 Harrowing + 1 intercultural operation with pigeonpea as test crop recorded significantly higher infiltration rate, lower bulk density and better growth attributes resulted in higher grain yield (974 kg ha-1) and better rainwater use efficiency (0.82 kg ha-mm-1) compared to reduced (M2) and zero tillage (M3). Whereas, M2 recorded higher B:C ratio. Significantly higher available N (234.90, 196.58 and 181.92 kg ha-1), P2O5 (81.47, 47.53 and 41.99 kg ha-1), K2O (187.59, 159.50 and 142.38g ha-1) and OC (0.47, 0.44 and 0.40 %) at different soil depth viz., 0-7.5, 7.5-15 and 15-30 cm, respectively and also higher microbial population of bacteria, fungi, actinomycetes at 15 cm soil depth was noticed in zero tillage compared to other tillage practices. In in-situ green manuring practices with horsegram (C3) recorded significantly higher infiltration rate, soil moisture, microbial population, nutrient status, higher B:C ratio and lower bulk density as compared to sunhemp (C2). Overall adoption of conservation agriculture created positive impact on soil quality and crop yield in rainfed conditions.EnglishThesis