To develop fertilizer prescription equations based on target yield for brinjal, a field experiment was conducted in laterite soils of STCR field, College of Horticulture, Kerala Agricultural University, Thrissur by using integrated plant nutrient management system on the basis of STCR approach. Soil test data, fruit yield and NPK uptake by brinjal were used for obtaining four important basic parameters viz., nutrients required to produce one tonne of brinjal (NR), per cent contribution of nutrients from fertilizers (% CF), per cent contribution of nutrients from soil (% CS) and per cent contribution of nutrients from organic matter (%COM). The nutrient requirement of brinjal to produce one tonne of fruit yield was found to be 0.30 kg t-1 N, 0.03 kg t-1 P2O5 and 0.58 kg t-1 K2O respectively. The per cent contribution of nutrients from soil, fertilizer and FYM were 5.10, 8.51 and 0.02 for N; 20.39, 6.18 and 0.02 for P2O5; 10.29, 82.33 and 0.15 for K2O respectively. By using these basic parameters, ready reckoner of fertilizer doses was prepared for varying soil test values and desired yield targets of brinjal for NPK alone and NPK with FYM.

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