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 |
The study was conducted in soils of Vellore district of Tamil Nadu to delineate the soil available zinc and boron status. Totally 3010 soil samples were collected @ 4 samples per village covering 743 panchayat villages in 20 blocks of Vellore district. Samples were collected randomly at 0-15 cm depth and the GPS data (Latitude ºN and Longitude ºE) were recorded from each sampling site. Soil samples were analyzed for DTPA-Zn (Di-ethylene Tri-amine Penta Acetic acid extractable Zinc) and HWS-B (Hot Water Soluble Boron). The availability of zinc and boron in the soils of Vellore was marginal pertaining to fertility status. The analytical results were used for calculating per cent deficiency, nutrient index values and fertility ratings. The thematic maps were generated to show the extent of micronutrients deficiency or sufficiency based on block mean, nutrient index values and spatial variability. Deficiency of Zn was noticed in Jolarpet, Tiruppathur and Madhanur blocks which demands suitable management strategies for zinc nutrition of crops. Next to Zn, B deficiency was evidenced significantly in certain villages of Sholinghur block. A totally 44.3 per cent of the samples were found to be Zn deficient and 29.1 percent of the samples were found to be B deficient. The fertility rating class for Zn & B is marginal for which nutrient index values are 1.86 for zinc and 1.91 for boron.
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