Effect of Foliar Application of Nitrogen and NAA (Naphthalene Acetic Acid) on Yield and Economics of Cowpea (Vigna unguiculata L.)

Abstract

A field experiment was conducted during Kharif (Autumn) season 2021 at Experimental Field of the Crop Research Farm, Department of Agronomy, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Praygraj, Uttar Pradesh, India which is located at 250 30’ 42’’N latitude, 810 60’ 56” E longitude and 98 m altitude above mean sea level. The treatments consisted of three levels of urea spray – 1.0%, 1.5% and 2.0% and four levels of Naphthalene Acetic Acid [NAA] spray – 0ppm, 25 ppm, 50 ppm and 75 ppm. The Treatments were applied as foliar spraying after 20 and 40 days after sowing. The Experiment was laid out in Randomized Block Design (RBD) with twelve Treatments replicated thrice on the basis of one year experimentation. To determine the “Effect of foliar application of nitrogen(N) and NAA on yield and economics of Cowpea (Vigna unguiculata L.). The results showed that treatment with the application of N (Urea) 2.0% + NAA at 25 ppm recorded significantly highest number of pods per plant (16.93), number of seeds per pod (14.33), pod dry weight (4.17 g), test weight (18.42 g), seed yield (1436.26 kg ha-1), haulm yield (2651.97 kg ha-1). However, Maximum gross returns (1,20,204.7 INR ha-1), net returns (87,414.74 INR ha-1) and B:C ratio (2.66) were also reported in the same treatment of Nitrogen (Urea) 2.0% + NAA at 25 ppm.