BUTA SINGH DHILLON and P.K. SHARMA 2024. Physiology, growth and productivity of staggered sown spring sunflower (Helianthus annuus) in response to varying intra-row spacing and applied nitrogen in the Indo-Gangetic Plains. Indian Journal of Agronomy. 62, 4 (Apr. 2024), 496–504. DOI:https://doi.org/10.59797/ija.v62i4.5558.