Abstract
Soil Fertility mapping are helps in reducing the cost of fertilizer and environmental risks. In KRP Dam catchment, 92 surface soil samples collected from major paddy-growing soils were used for soil fertility mapping in a GIS environment. Soil properties viz, pH ranged from highly acidic to strongly alkaline, with the maximum area being slightly alkaline (19.98%) and moderately alkaline (26.16%), -1 but soils were non-saline (<2 dSm ). Organic carbon (OC) varied from low (<0.5%) to high (>0.75%) occupied 20.01% and 44.90%, respectively. The soils were high (>-1 22 kg ha ) in available phosphorus (P), occupying 42.55% area followed by low P in 19.35% area and medium P in 18.72% area. There soils were medium to high in available potassium (K) and available sulphur (S). DTPA-Cu was found to be above the critical limit, but deficient in iron, manganese, zinc and boron. The extent and distribution of soil nutrients will help in site-specific fertilizer recommendations for paddy farming in the KRPdam catchment.
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