VASUDEVAN, S. N.; VIRUPAKSHAPPA, K.; VENUGOPAL, N.; BHASKAR, S. Response of Sunflower (Helianthus Annuus) to Phosphorus, Sulphur, Micronutrients and Humic Acid under Irrigated Condition on Red Sandy-Loam Soil. Indian J Agri Sci 2013, 67 (3).