Impact of Biostimulant Soil Application on Improving Soil Properties and Nutrient Availability in Sweet Potato Field

An experiment conducted at the vegetable farm, Department of Vegetable Science, College of Horticulture and Forestry, Jhalrapatan City, Jhalawar during rabi season 2020-21. The experiment consisted of twelve treatment combinations having four levels each of Humic acid (0, 10, 20 and 30 ml/l) and Seaweed (0, 1 and 2 ml/l) in Factorial Randomized Block Design with three replications, while Humic acid was applied through soil application and seaweed was applied through foliar application. There was significant effect of biostimulants (Humic acid and seaweed) treatment on soil parameters (i.e. soil pH, Ec, Bulk density, Particle density and available NPK & Organic carbon) of sweet potato field alone and combination over control. The individual and combined application of humic acid at 30 ml/l significantly affected the soil pH 7.65, soil Ec 0.42, bulk density 1.32, particle density 2.62, available nitrogen 314.66 kg/ha, phosphorus 24.37 kg/ha, potassium (279.68 kg/ha) and maximum soil organic carbon (0.64 %) were recorded as compared to control.