Abstract
The objective of this paper was to study the variability of the dielectric constant of dry soils with their physical parameters viz sand, silt, clay contents, bulk density and wilting point. Twenty nine soil samples were collected from different locations of four states Uttarakhand, Madhya Pradesh, Karnataka and Tamilnadu of India at the depth of 0 – 15 cm. Soil samples were analyzed for physical properties. The dielectric constant of dry soil samples was measured at C- band microwave frequency 4.5 GHz and its variation with physical parameters of soil samples were presented. The results were analyzed statistically, which showed that the dielectric constant has significant positive correlation with sand and bulk density of soil while significant negative correlation with silt, clay, wilting point and porosity of soil. Similarly higher order polynomial correlation of bulk density with texture of soil was observed
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