Vol. 11, Issue 10 (2022)

One hundred and fifty eight (158) soil samples were collected from different agro-ecological situations (AES) in Eastern Dry Zone of Karnataka (EDZ) and were analysed for available sulphur and categorized soil to five classes as very low, low, medium, high & very high. The critical limit for soil available and plant sulphur and ratings for soil available sulphur were determined by conducting pot culture experiment in 24 soils collected from six different locations from each category. The results reveal that, response of finger millet was higher in very low and low S fertility soils as compared to medium and high status. Critical limit for available soil sulphur (SO₄^2-) was 5 mg kg^-1 whereas, for finger millet plant the critical concentration was 0.23 per cent. Fertility ratings for available sulphur were proposed as very low (VL) <5.00 mg kg^-1, low (L) 5.10 to 14.00 mg kg^-1, medium (M) 14.10 to 24.00 mg kg^-1, high (H) >24.00 mg kg^-1. The available sulphur status of soils four AES varied from 3.32 to 37.15 mg kg^-1. Further, finger millet was grown in different S fertility soils at farmer’s field for 7 years found to be promising for S critical limit in plant & soil.