ASSESSMENT OF SOIL QUALITY THROUGH MINIMUM DATA SET IN INTENSE TOMATO GROWING SOILS OF CHINTAMANI TALUK, KARNATAKA
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Date
2022-12-26
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University of Agricultural Sciences GKVK, Bangalore
Abstract
An experiment entitled “assessment of soil quality through minimum data set in intense tomato growing soils of Chintamani taluk, Karnataka” was conducted. Free survey conducted for soil sampling during the year 2021. The soils of Chintamani taluk were heterogeneous in nature. Yearly two times tomato growing soils were found to possess optimum soil properties viz., bulk density ( Mg m-3), Maximum water holding capacity (MWHC) (35.36 %), porosity (36.08 %), pH (6.41), electrical conductivity (0.46 dS m-1), organic carbon (0.43 %), available nitrogen (236.87 kg ha-1), phosphorus (AP) (66.25 kg ha-1), potassium (AK) ( 321.78 kg ha-1) and sulphur (18.75 mg kg-1), exchangeable calcium (7.11 meq 100 g soil-1) and magnesium (3.63 meq100g soil-1) and micronutrients compared to yearly one and three times tomato growing soils. In PCA technique the 26 soil properties were reduced to Minimum Data Set explaining the variation 35.32 %, 32.14 % and 27.64 % in yearly one, two and three times tomato growing soils. MWHC, Alkali phosphatase, Volume of expansion, AK and boron are the soil quality indicators of cumulative tomato growing soils. From this data it can be concluded that tomato can grow two times per year it will not affect soil quality parameters as well as yield of tomato, but yearly three times tomato growing soils have an adverse effect on soil quality and yield parameters in intense tomato growing soils