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Nutrient Index Values and Soil Fertility Ratings for Available Sulphur and Micronutrients of Tiruchirappalli District of Tamil Nadu, India

2020; Excellent Publishers; Volume: 9; Issue: 3 Linguagem: Inglês

10.20546/ijcmas.2020.903.040

2319-7706

Abhishek Amar, R. Shanmugasundaram,

Agricultural Science and Fertilization

The nutrient index (NI) value for each of the nutrients is computed for the fourteen blocks of Tiruchirappalli district from the percentage of samples that falls under the category of high, medium and low. The NI value (2.17- 2.87) for available S, in the most of blocks of Tiruchirappalli district was recorded the high nutrient index value. The nutrient index value (1.43-2.50) for DTPA-Cu was very low in Thirupparankundram, Melur, Chellampatty and Alanganallur, in case of Manikandam block was falls in high category. The NI value (1.33-2.34) of available Zn was found very low in the most of blocks, marungapuri block showed high NI value. The NI values (2.54 to 3.00) for manganese was found in Thiruverumbur and Marungapuri block with high nutrient index value. The NI values (2.35-289) for DTPA-Fe was found that high in Thiruverumbur block, all the remaining blocks fall under very high category. The NI value for boron was recorded as (1.67 -2.56). Regarding fertility rating class in Tiruchirappalli district, the available zinc and copper were very low. The available manganese, iron, sulphur and boron were found to be under high category.