Abstract

A field experiment was conducted at Shalimar campus during kharif seasons in 2004 and 2005 on a silt clay loam soil, with average available N and K, and low P. The experiment was done to study the production performance of soybean as influenced by seed rate, row spacing and fertility levels under temperate conditions. The experiment, comprising 27 treatment combinations viz., 3 levels each of seed rate (40, 60 and 80 kg ha^-1), row spacing (30, 45 and 60 cm) and  fertility  (40:60:40, 60:90:60 and 80:120:80 of  N:P₂O₅: K₂O  kg ha^-1), was laid out in split plot design, and replicated thrice. The highest B:C ratio of 3:20 and maximum net returns of Rs. 37351 were recorded with treatment combination of 60 kg seed rate ha^-1 at 45 cm row to row spacing and with the application N : P₂O₅:K₂O in the ratio of  60:90:60 kg ha^-1.

Key words: Fertility, seed rate, soybean, spacing, relative economics, temperate.