Response of Eggplant, to Various N, P, K Levels and Plant Densities on an Oxisol

Abstract

At 90 x 60 cm planting distance eggplant showed a gradual response to N with each increment of 112 kg/ha up to 450 kg/ha (highest level studied). At 60 x 60 cm response was obtained with the application of 225 and 338 kg of N/ha; a slight decrease in yield was observed with the application of 450 kg/ha. Limited response to P₂0₅ or K₂O was obtained. There were no differences in yield attributable to plant densities. The fertilizer yield equation indicated that 398 kg N, 200 kg P₂0₅ and 253 kg K₂O/ha are needed to obtain maximum eggplant yields under the conditions prevailing at the experimental site in lsabela.