Influence of Liming and Phosphorus Application on Growth of Soybean in Acidic Soil of Chandauli, Uttar Pradesh, India

The objective of this research is to solve problem due to acidity and phosphorus deficiency in soybean crop grown in acidic soils. As acidic soils have an abundance of exchangeable forms of aluminum and hydrogen and a low supply of basic cations, they limit the productive potential of crops. The retention of phosphorus (P) is usually high in acidic soils. At the study area, soil acidity is well-known for limiting the productivity of crop. This study was conducted to determine the influence of liming and phosphorus application on growth of Soybean in acidic soil of Chandauli district. Factorial combinations of four levels of lime (0, 25, 50 and 100% of lime requirement) and four sources of phosphorus (No phosphorus, triple super phosphate, Mussoorie rock phosphate and phosphate rich organic manure) were laid out in completely randomized design with three replications. The results revealed that lime x phosphorus interaction were significant for plant height and relative chlorophyll content SPAD. Findings shows that lime @100% significantly increased the plant height and SPAD values of soybean plant and remained at par with lime @50%. Similarly, application of phosphorus source PROM significantly increased the plant height and SPAD value and remained at par with TSP. Combined application of lime @100% + PROM significantly increased the growth of soybean crop. It remained at par with lime @100% + TSP, lime @50% + PROM, lime @50% + TSP, indicating saving of 50% lime and PROM can be considered as a sustainable alternative that contributes to both phosphorus availability and soil health. The results of the study verified that application of lime and phosphorus sources improved growth and growth related traits of soybean crop.