Open AccessSpatial Distribution of Soil Nutrients in Berambadi Watershed of Chamarajanagar District, Karnataka for Sustainable Crop Production
Author(s) -
Rajendra Hegde,
S. Dharumarajan,
K.V. Niranjana,
H.R. Savitha,
M. Lalitha,
R. Vasundhara
Publication year - 2019
Publication title -
agropedology
Language(s) - English
Resource type - Journals
ISSN - 0971-1570
DOI - 10.47114/j.agroped.2021.jun4
Subject(s) - environmental science , spatial distribution , geostatistics , variogram , nutrient , soil test , watershed , spatial variability , soil fertility , hydrology (agriculture) , soil science , phosphorus , soil water , kriging , mathematics , geology , statistics , ecology , machine learning , computer science , biology , materials science , geotechnical engineering , metallurgy
The spatial distribution of soil nutrients was assessed in Berambadi watershed of Chamarajanagar district, Karnataka based on geo-statistics model. A total of 447 surface soil samples (0-20 cm) were collected at 250 m grid interval and analyzed. Semi variogram parameters (nugget, sill and range) for each soil property with best fitted models were identified based on minimum root mean square error (RMSE). Exponential, spherical and gaussian models were fit well for the soil properties. The nugget-sill ratio showed that the spatial variability of soil nutrients moderate spatial dependence (25-75 %) except soil pH and zinc ( 330 kg ha-1) in more than 60% of total geographical area of Berambadi watershed. Spatial distribution of soil nutrients is most important to know the status of soil fertility, which helps in adjusting the agricultural management measures for better crop production.