VASUDEVAN, S.N. (2013) “Response of sunflower (Helianthus annuus) to phosphorus, sulphur, micronutrients and humic acid under irrigated condition on red sandy-loam soil”, The Indian Journal of Agricultural Sciences, 67(3). Available at: https://epubs.icar.org.in/index.php/IJAgS/article/view/29858 (Accessed: 20 October 2025).