2024, Vol. 7, Special Issue 3

author(s)
Netam AK, Bhambri MC, Porte SS and Sunil Kumar

abstract
On - farm experiments were conducted during Kharif and Rabi seasons of 2019-20 at 24 farmer’s fields at 6 villages viz. Aturgaon, Bevarti and Mohpur of Block- Kanker and Hatkondal, Gotulmunda and Damkasa villages of Block - Durgukondal, District-Uttar Bastar Kanker, situated in Chhattisgarh Plain Zone (CG-1) and Bastar Plateau Zone (CG-2) of Chhattisgarh. Experiment conducted at 4 farmer’s field in each village. The soils of experimental site were sandy loam to loam; with low in available nitrogen (188.16 kg ha^-1) and available phosphorus (10.76 kg ha^-1) and medium in available potassium (321.16 kg ha^-1) and organic carbon (0.56%) and neutral in reaction (7.56 pH). The rice- chickpea cropping system experiments were conducted with seven treatments viz. control (T₁), N (T₂), NP (T₃), NK (T₄), NPK (T₅), NPK+ micro nutrient (T₆) and Farmers practice (T₇). For Zn micro nutrient ZnSO₄ applied in rice and Single Super Phosphate applied for both P and S in chickpea under T₆ treatment. The recommended dose of nutrients were: 100:60:40 kg ha^-1 N: P2O5: K2O + 20 kg ha^-1 ZnSO₄ for rice and 20:40:20:20 kg ha^-1 N: P₂O₅: K₂O: S for chickpea. Nutrients dose 60:40:30 kg ha^-1 N: P₂O₅: K₂O and 10:20:10 kg ha^-1 N: P₂O₅: K₂O were applied in rice and chickpea crops respectively under farmer’s practice. IGKV R-2 variety of rice and JAKI-9218 variety of chickpea grown with recommended package of practices under irrigated condition. The application of recommended dose of NPK + micro nutrient recorded significantly higher grain yield of rice (50.40 q ha^-1), chick pea (13.15 q ha^-1) and RGEY (85.85 q ha^-1). Farmers practice treatment recorded highest nutrient response 11.49 kg grain/ kg nutrient and application of recommended dose of N in rice- chickpea cropping system recorded highest nutrient response Rs/Re (15.15). Application of recommended dose of NPK+ micro nutrient recorded significantly higher nutrient uptake N (153.41 kg ha^-1), P (32.79 kg ha^-1) and K (174.08 kg ha^-1) by rice- chickpea cropping system. Application of recommended dose of NPK + micro nutrient recorded significantly higher organic carbon (0.61%), available nitrogen (200.65 kg ha-1), phosphorus (11.42 kg ha-1), potassium (316.60 kg ha-1) at end of the cropping system. Highest positive balance of available nitrogen (165.9 kg ha^-1) and phosphorus (33.45 kg ha^-1) and potassium (169.52 kg ha^-1) recorded in application of recommended dose of NPK + micronutrient. Highest gross return (156585 Rs ha^-1), net return (100620 Rs ha^-1) and B: C ratio (2.80) of rice- chickpea cropping system recorded under application of recommended dose of NPK + micronutrient.