KAPILA SHEKH AWAT, and Y.S. SHIVAY. “Effect of Nitrogen Sources, Sulphur and Boron Levels on Productivity, Nutrient Uptake and Quality of Sunflower (Helianthus Annuus)”. Indian Journal of Agronomy 53, no. 2 (October 10, 2001): 129–134. Accessed June 24, 2026. https://pub.isa-india.in/index.php/ija/article/view/4847.