Pawan Kumawat, Joy Dawson, Lalit Kumar Sanodiya and Abhinay Singh Patel
Abstract
A field experiment was carried out during Kharif season of 2022, at Crop Research Farm, Department of Agronomy, SHUATS, Prayagraj, (U.P.). The experiment field was entitled as âInfluence of seaweed sap and phosphorus on growth and yield of soybeanâ. The treatment consisted of 3 levels of seaweed sap foliar application (10, 15 and 20%) and phosphorus (50, 60 and 70 kg/ha) basal application and a control. The experiment was layout in Randomized Block Design (RBD) with 10 treatments and replicated thrice. Application of seaweed sap 20% along with phosphorus 60 kg/ha recorded highest plant height (68.20 cm), maximum number of root nodules per plant (63.83), root length (26.13 cm), highest SPAD value (chlorophyll content) (48.22), leaf area index (7.89), higher seed yield (2.39 t/ha), oil yield (461.99 kg/ha), protein yield (914.89 kg/ha) post harvest chemical properties of soil, pH (6.90), EC (0.487), organic carbon (0.313 %) available plant nutrient Nitrogen (279.79 kg/ha), Phosphorus (11.70 kg/ha), Potassium (215.89 kg/ha) and the maximum net return (1,01,073.53 INR/ha) and B:C ratio (2.47). This study show that application of seaweed sap (Kappaphycus alvarezii and Sargassum spp.) 20% along with combination of phosphorus 60 kg/ha (Treatment 8) recorded higher Growth, yield and benefit cost ratio of soybean.