Vol. 7, Issue 3 (2019)
Geostatistical assessment of spatial variability of soil available potassium under different land uses of a part of Ludhiana district of Punjab
Author(s): Bhabani Prasad Mondal and BS Sekhon
Abstract: Heterogeneity in soil system primarily causes the spatial variations of different soil parameters. A systematic study was conducted for assessing the spatial variability pattern of soil fertility parameters especially soil available potassium (K) under three different land use systems viz. berseem base land use, rice-wheat and poplar-wheat cropping systems. A total 144 georeferenced surface soil samples were collected from these land uses and analyzed chemically to determine available K and other physicochemical parameters. Classical statistical techniques revealed the degree of variability in terms of coefficient of variations (%CV). Geostatistical tools semivariograms were calculated to find the best fitted model for characterizing the spatial pattern of K. The Gaussian model was found as a best model for describing the spatial variability of K under berseem based land use, whereas, Exponential and spherical models were best for rice-wheat and poplar-wheat system respectively. The semivariogram parameter i.e. the nugget: sill ratio (NS ratio) confirmed the moderate spatial dependence (NS in between 0.25 to 0.75) for available k under these three land uses. The ordinary kriging technique was employed for generating spatial variability maps of available K and these maps would be the useful guides for site specific available potassium management for the study area.
Pages: 1888-1892 | 711 Views 165 Downloads
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How to cite this article:
Bhabani Prasad Mondal, BS Sekhon. Geostatistical assessment of spatial variability of soil available potassium under different land uses of a part of Ludhiana district of Punjab. Int J Chem Stud 2019;7(3):1888-1892.
