Vol. 12, Issue 3 (2023)

Author(s):
AK Netam, MC Bhambri, SS Porte and S Kumar

Abstract:
On –farm experiments were conducted during Kharif and Rabi seasons of 2018-19 at 24 farmer’s fields at 6 villages viz. Aaturgaon, 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 (175.45 kg ha^-1) and available phosphorus (8.68 kg ha^-1) and medium in available potassium (290.24 kg ha^-1) and organic carbon (0.50%) and acidic in reaction (6.5 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 (51.03 q ha^-1), chick pea (13.34 q ha^-1) and RGEY (84.19 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 + micronutrient recorded significantly higher nutrient uptake N (144.18 kg ha^-1), P (30.42 kg ha^-1) and K (132.56 kg ha^-1) by rice- chickpea cropping system. Application of recommended dose of NPK+ micronutrient recorded significantly higher organic carbon (0.56%), available nitrogen (194.57 kg ha^-1) and phosphorus (9.24 kg ha^-1), while application of recommended dose of NPK recorded higher potassium (306.63 kg ha^-1) at end of the cropping system. Highest positive balance of available nitrogen (163.3 kg ha^-1) and phosphorus (30.98 kg ha^-1) recorded in application of recommended dose of NPK + micronutrient and application of recommended dose of NPK recorded higher potassium (144.68 kg ha^-1). Highest gross return (151954 Rs ha^-1), net return (97197 Rs ha^-1) and B: C ratio (2.78) of rice- chickpea cropping system recorded under application of recommended dose of NPK + micronutrient.