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 |
A soil survey was conducted in three talluks (Davangere, Channagiri and Honnali) of more than ten year old arecanut plantations of Karnataka to assess status of available boron, its different fractions and its relationship with other properties of soil. Soil analysis for physical and chemical properties revealed that these soils belongs to sandy loam to sandy clay loam texture with neutral to alkaline pH, having low EC with low to medium organic matter (0.09 to 1.56 %) content and cation exchange capacity ranged from 7.55 to 21.38 Cmol (p+) kg-1. The Available boron content was sufficient and varies from 0.12 to 1.02 mg kg-1. Zinc fractions like Rs-B, Sp-B, Ox-B Org-B, Res-B Total were varied from 0.23 -0.89, 0.23- 1.56, 2.12-10.23, 1.13 – 8.56, 46.33 – 212.65 and 56.97 – 233.54 mg g-1. Available B recorded significant, positive correlation with Sp-B, Ox-B, negatively with, Rs-B, Org-B and Total-B but non-significant, negative correlation with Res-B. The oxide bound boron fraction was relatively higher than the readily soluble and specifically adsorbed forms, major portion of boron in soils existed as residual or occluded forms which accounted for 92.9 to 98.9 per cent of total boron.
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