Response of Phosphorus, Sulphur and Foliar Spray of GA3 on Nutrient Content and Uptake of Soybean [Glycine max (L.) Merrill]

Abstract

Background: Soybean is an important oil seed crop grown in a varied range of climate and soils in India. Phosphorous and sulphur is an important macronutrient required for plants. Their deficiency in soil is a worldwide concern for production of oil seed crops. The gibberellic acid involved in plant growth and development. Therefore, investigation was carry out to study influenced of phosphorus, sulphur and gibberellic acid on nutrient content and uptake of soybean. Methods: An experiment conducted during kharif-2020 on soybean in sub-sub split plot design with three replications. The twenty four treatment combinations were comprised viz. four levels of phosphorus (Control, 20, 40 and 60 kg ha-1), three levels of sulphur (15, 30 and 45 kg ha-1) and two levels of gibberellic acid (Foliar spray of GA3 @ 75 ppm and no spray). Result: Results revealed that application of 40 kg phosphorus ha-1 and 30 kg sulphur ha-1 is optimum dose for obtaining higher available nitrogen, phosphorus, potassium and sulphur in the soil after crop harvest, nutrient content in seed and straw and uptake of soybean crop. The foliar spray of gibberellic acid @ 75 ppm is also beneficial for improving productivity and profitability of soybean crop.