Influence of Potassium and Sulphur on Yield, Economics and Quality of Summer Sunflower (Helianthus annuus. L)

The experiment was carried out during summer season of 2022 at crop research farm (CRF), Department of Agronomy, SHAUTS, Prayagraj (U.P), to evaluate the influence of potassium and sulphur rates on growth and yield of summer sunflower. The treatments consisted of 3 levels of Potassium (30,40,50 kg/ha) and Sulphur (10,20,30 Kg/ha) and a control. The experiment used a Randomized Complete Block Design (RCBD) with ten treatments that were replicated three times. The findings revealed that application of 50 kg potassium with combination of 30 kg sulphur as soil application recorded highest yield attributes namely seeds per capitulum (332.4) Test weight (33.7 g), seed yield (1,463.44 kg/ha), stover yield (3,211.6 kg/ha), harvest index (31.3%) and oil content(41.8 %). Maximum gross returns (98,050.48 (Indian rupee) INR/ha), net returns (64,665.51 (Indian rupee) INR/ha) and highest benefit - cost ratio (1.94) was found in treatment (T9) with the application of 50 kg potassium soil application with combination of 30 kg sulphur as soil application.