Effect of phosphorus and iron on nutrient uptake and yield of green gram (Vigna radiata L.)

A field experiment was carried out during Kharif 2024 at the Research Farm of Vivekananda Global University, Jaipur, to evaluate Effect of phosphorus and iron on nutrient uptake and yeild of greengram (Vigna radiata L.). The study employed a factorial randomized block design with 16 treatment combinations, involving four phosphorus levels (0, 20, 40, and 60 kg/ha) and four iron treatments (control, 15 kg/ha basal application, 1.0% foliar spray at 25 and 40 DAS, and 1.0% foliar spray at 25, 40, and 55 DAS), each replicated thrice. The results demonstrated significant improvements in growth attributes, yield components, seed yield, nutrient uptake, and protein content with increasing phosphorus and iron levels. Notably, the combined application of 60 kg P/ha with three foliar sprays of iron resulted in the highest values for plant height, dry matter accumulation, pod number, seed yield, and protein content. Nutrient uptake of N, P, and Fe was also maximized under this treatment. From an economic perspective, this combination yielded the highest net return and benefit-cost ratio. The findings underscore the importance of integrated phosphorus and iron management for improving greengram productivity and nutritional quality under semi-arid conditions.