Abstract

Field experiment was conducted at Millet breeding station, Tamil Nadu Agricultural University, Coimbatore, during kharif, 2007 to find out the effect of N and growth regulators on the growth and yield of soybean. The experiment was laid out in a randomized block design replicated thrice. The combinations of three N levels viz., 20kg N ha-1 , 30 kg N ha -1 and 40 kg N ha -1 as basal and three growth regulators viz., Salicylic acid @ 100 ppm, Ethrel @ 100 ppm and Chlormequat chloride @ 200 ppm were the treatments tried. The results of the experiment indicated that application of N @ 20 kg/ha as basal and foliar spraying of salicylic acid @100 ppm recorded significantly better growth, yield parameters and grain yield.

Keywords: Soybean, growth regulators, nitrogen, growth, yield