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 |
In order to investigate changes of potassium (K) status in western plain of Rajasthan, two hundred nine surface (0-15cm depth) soil samples were collected from seventeen tehsils of three districts (Bikaner, Churu and Jaisalmer). Soils were in general light in texture and neutral to slightly alkaline in reaction. The OC content of the soils varied from 0.1 to 2.5 g kg-1. H2O-K and NH4OAc-K ranged from 2.9 to 47.1 (mean value 18.3) mg kg-1 and 13.8 to 202.7 (mean value 91.2) mg kg-1, respectively. The HNO3-K and HCl-K varied from 154.4 to 635.5 (mean value 318.7) mg kg-1 and 8.1 to 99.3 (mean value 40.8) mg kg-1, respectively. Highly significant positive relationships amongst various fractions of soil K indicated existence of a dynamic equilibrium between different forms of K. The studied soils had major portion of their K fraction content in lattice-K it contributed about 87.0 to 90.3 % of total-K because of rich K bearing minerals of soils followed by 6.7 to 9.9 % of Non-exch-K and 2.3 to 3.3 % of Exch-K towards total-K. On the basis of nutrient index mostly soils were found medium (68.4 %) in available K.
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