Effect of Fly ash combination with inorganic fertilizer and FYM on dehydrogenase activity in Entisol

Abstract

Field experiment were conducted in farmer field around National Thermal Power Corporation (NTPC) Tilda, Raipur (Chhattisgarh) during kharif season 2013 to evaluate different doses of fly ash (20, 40, 60 t ha-1) combination with and without organic fertilizer on dehydrogenase activity in soil. Application of increasing doses fly ash with FYM was found to increase dehydrogenase activity and the highest recorded under application of 75% GRD + 40 t ha-1 fly ash + 5 t FYM ha-1 and tended to marginal decrease dehydrogenase activity 60 t fly ash ha-1. The analysis of fly ash amendment soils and the produce rice grown are well within the permissible and safe limit even after the application of fly ash at higher dose 40 t ha-1 to the soil.