Assessment of Soil Carbon Pools Under Land Configuration and Moisture Conservation in Rainfed Food-Fodder Production System in Alfisols of Central India

In recent years, declining soil organic carbon (SOC), nutrient depletion, and reduced water holding capacity have emerged as major challenges to sustainable agriculture in semi-arid regions of central India. Integrating food-fodder crops with perennial legumes and grasses presents a promising alternative to improve system productivity and soil carbon pools (SCPs). To evaluate this, a four-year experiment was conducted at the ICAR-Indian Grassland and Fodder Research Institute, Jhansi, Uttar Pradesh, to assess the impacts of land configuration and moisture conservation technologies in food-fodder-based system, i.e. trispecific hybrid fodder grass (TSH) + Leucaena + sorghum + cowpea-chickpea. The study revealed that permanent broad bed and furrow (PBBF) + in-situ moisture conservation (IMC) and PBBF + life saving irrigation (LSI) increased the SOC by 35% compared to flatbed (FB) + rainfed (RF) in sorghum + cowpea-chickpea cropping system. The results exhibited that the maximum potassium permanganate carbon (814 mg kg-1), hot water soluble-carbon (96.5 mg kg-1), soil microbial biomass carbon (292 mg kg-1), particulate organic matter carbon (7.4 mg kg-1), humic acid (59%), and fulvic acid (63%) carbon were recorded under PBBF + LSI treatment, followed by PBBF + IMC management. In contrast, the lowest carbon fraction values were observed under FB + RF system. These findings underscore that adopting food-fodder-based cropping systems with moisture conservation techniques can significantly improve soil quality in the rainfed semi-arid ecosystems of central India and similar eco-regions globally.