National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Knowledge of spatial variability in soil fertility is important for site specific nutrient management. In this study, spatial variability in properties that influence soil fertility such as soil organic carbon, free CaCO3, available macro and micronutrients in surface soils of western farm of Horticultural college and Research Institute (HC&RI), Periyakulam taluk of Theni district of TamilNadu were quantified and respective thematic maps were prepared on the basis nutrient rating using Arc Map 10by employing interpolation method. Soils were slightly alkaline in reaction with normal electrical conductivity. The coefficient of variation values for soil OC, available B and available Zn were 0.43, 0.74 and 0.55 respectively. Organic carbon content in the soils was low in majority of the samples. Among the major nutrients, available N become most limiting nutrient (91.3 % deficient) while in micronutrients, Cu is deficient in 98.4 % of samples As per the nutrient index value, fertility class of soil samples are very low, marginal and adequate respectively for available N, P and K while very high, adequate, low, very low and marginal for DTPA extractable Fe, Mn, Zn Cu and HWSB respectively. The observed spatial variability in various soil properties that influence soil fertility will be helpful for making crop management decisions.
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