Correlation of Physico-chemical Parameters of Soil and Soil Nutrient Index Status of Kollam District, Kerala, India

The present investigation was carried out at Sam Higginbottom University of Agriculture Technology and Sciences in the department of Soil Science and Agricultural Chemistry lab, India In this study, a total of 27 soil samples were collected from nine different villages on 27 November 2021 in the Kollam district of Kerala, and from each village 3 soil samples were collected and analyzed for their Physico-chemical parameters by using standard laboratory techniques. According to Nutrient Index values, the villages were found to be high in Organic Carbon (2.59), Phosphorus (2.88), Calcium (3), and Magnesium (2.55). The low category was found in Nitrogen (1). The medium category was found in Potassium (1.88). According to the critical limits of soil nutrients the results observed, 100% soil samples were in low range of Nitrogen (N) (64.5 – 181.32 kg ha-1), 92.5% soil samples were in high range of Phosphorous (P) (9.40 – 56 kg ha-1), 89% soil samples were in low to medium range of Potassium (K) (100 – 403 kg ha-1), 100% of soil samples were in the high range of Calcium (Ca) (3.2 – 18 Meq/100g), 78% of soil samples were in high range of Magnesium (Mg) ( 0 – 7.60), 100% of soil samples were in the low range of Sulphur (S) (0.96 – 7.2). The results showed that improvement has to be one for improving soil fertility and quality by practicing improved cropping patterns, decomposition of organic wastes, mulching, and tillage practices.