Studies on Boron Fractions with Different Physico-Chemical Properties in more than Ten Year Old Arecanut Plantations

H.C. Nagaveni, C.T. Subbharayappa
2018 International Journal of Current Microbiology and Applied Sciences  
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
more » ... t 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. K e y w o r d s
doi:10.20546/ijcmas.2018.703.042 fatcat:gpisyqn4ardyhmmuvushhefcsy