Abstract
An incubation study was conducted to characterize soil quality as affected by organic amendments (FYM, biochar and, poultry manure @ 25 t ha-1) along with or without fly ash (@ 22.4 t ha-1) in Vertisol. Physical and chemical parameters of soil quality like pH, EC, bulk density, porosity, moisture content, organic carbon and available N, P, K measured at the end of incubation period i.e. 10th week showed that combined application of soil amendments (FYM + fly ash, biochar + fly ash, poultry manure + fly ash) had significantly better results than individual application of the respective soil amendments. Soil microbial biomass carbon (SMBC) and dehydrogenase enzyme activity (DHA) increased steadily up to 6th weeks of incubation with a marginal decrease during last phase. At the end of incubation period (10th week), SMBC and DHA was highest in the soil amended with FYM + fly ash; T (476.6 mg/kg of soil and 10.28 μg TPF g-1 soil h-1). The soils treated with 5 organic amendments particularly FYM and poultry manure along with fly ash showed best performance in terms of soil quality improvement in Vertisol.
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