Response of plant growth regulators on growth and yield of groundnut (Arachis hypogaea L.)

Abstract

The field experiment was conducted during kharif season of 2023 at Crop Research Farm, Department of Agronomy. The experiment was laid out in a Randomized Block Design with 10 treatments and replicated thrice. The treatments consisted of 3 levels of GA3 (50ppm, 75ppm and 100ppm) and 3 levels of IAA (30ppm, 40ppm, 50ppm) along with recommended doses of fertilizer and a control (20:60:40 kg N-P-K/ha). Application of GA3 at 100ppm and IAA at 50ppm (Treatment 9) recorded highest plant height (34.88cm), Nodules/plant(134.78), maximum plant dry weight (24.77), crop growth rate (23.64), No. of pods/plant (21.22), kernel yield (2.11kg/ha), test weight (242.30g),seed yield (3616.2 kg/ha), haulm yield (3718.4 kg/ha) and also recorded maximum gross return (186387.6 INR/ha), net return (139543.6 INR/ha) and B:C (2.97).