Effect of Potassium and Sulphur on Growth and Yield of Greengram (Vigna radiata L.)

Greengram is scientifically known as (Vigna radiata L.) and commonly known as mung bean. India is the producer of pulses, accounting for 27 per cent of the world's production. Sulphur is also a constituent of vitamin biotin and thiamine, and also of iron-Sulphur protein ferredoxin. Potassium (K) is one of the essential nutrients for plant growth and vital for sustaining modern high-yield agriculture. The paper aims to investigate the effect of potassium and Sulphur on the growth and yield of Greengram (Vigna radiata L.). A field experiment was conducted during the Zaid season of 2025 at the Crop Research Farm, Department of Agronomy, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, U.P., India. The experiment was laid out in a randomized block design with ten treatments and replicated thrice. The observations were recorded for plant height, number of branches per plant, number of nodules per plant, plant dry weight, crop growth rate, relative growth rate, pods per plant, seeds per pod, test weight, 0-grain yield and straw yield. The factors are Potassium (10, 20 and 30 kg/ha) and Sulphur (5, 10 and 15 kg/ha) along with a control (NPK 20-40-20 kg/ha). The result of the experiment showed that the application of T9: Potassium at 30 kg/ha. + Sulphur at 15 Kg/ha significantly The highest application rates of Potassium and Sulphur (T9) resulted in significant increases across all measured growth and yield parameters compared to the control, Plant dry weight (25.87), Crop growth rate (18.74), Relative growth rate (0.03), No of Pods/ plant (21.47), No of seeds/pod (7.30), Test Weight (62.30), Grain Yield (1.82), Straw Yield (3.24), Harvest Index (35.95). Maximum gross return (INR/ha 152080), Net return (112897.02), and B:C ratio (2.88) were obtained highest in treatment 9 (Potassium at 30 kg/ha+ Sulphur at 15 kg/ha). It is concluded that application of Potassium at 30 Kg/ha +Sulphur at 15 kg/ha has performed better in growth parameters, yield attributes, and benefit cost ratio of Greengram.