Cauliflower growing light textured soils of Rangareddy district were collected from thirty locations and analysed for their quanity parameters (KL, KX, KO), Potential buffering capacity of potassium (PBCK) and intensity parameters AReK. The KL (quantity factor) ranged from 0.12 to 1.21(c mol (p+) kg-1). The AReK (intensity factor) showed a range of 0.11 to 17.0 (ML-1)1/2 × 10-3. The PBCK (c mol (P+) kg-1/ (ML-1)1/2 × 10-3) ranged from 0.025 to 5.727. These low PBC values indicate the low buffer capacity of the soil which requires the judicious use and frequent fertilization for ensuring sufficient K level in the soil to meet the demand without contributing to excessive K leaching below the root zone.

Keywords: Q/I parameters, Light textured soils, Rangareddy district.