Balanced Nutrient Recommendations for Dry Chilli in an Inceptisol of Tamil Nadu based on a Targeted Yield Model

Background: Considering the high cost of fertilizers and adverse effect its overuse on environment soil health, proper organic manure-fertilizer recommendations basis test values, residual yield targets chilli becomes vital. Methods: Field experiment was carried out Periyanaickenpalayam series Inceptisol order at farmers holding, Dindigul, Tamil Nadu during 2021-2022 after establishment marked fertility gradient with respect to available N, P K by fodder sorghum. The crop laid in a fractional factorial design comprising 24 treatments 4 levels N (0, 50, 100 150 kg ha-1), for both phosphorus pentoxide (P2O5) potassium dioxide (K2O). Farmyard manure (FYM) were 0, 6.25 12.5 ha-1.From field data, fundamental parameters- nutrient requirement (NR) nutrients contributions from (Cs), fertiliser (Cf) farmyard (Co)-were determined. Result: percentage estimated (%Cf) that contributed towards total amount taken up dry calculated be 44.09, 39.29 76.91 per cent P2O5 K2O, respectively. K2O greater than seen as uptake. Incase contribution form (% Cs) is K2O. FYM Co) 29.42, 14.40 38.73 One quintal production require 4.24 nitrogen, 1.91 4.80 oxide (K2O) nutrients. Fertiliser prescription equations (FPEs) ready reckoners operating range values intended target under NPK alone IPNS built using basic data.