Kotur, S. C., Ramesh, P. R., Anjaneyulu, K., & Ramachandran, V. (2012). Evaluation of cropping sequences of hybrid vegetables for N fertilizer recovery efficiency and utilization of residues using 15N-enriched urea. The Indian Journal of Agricultural Sciences, 82(9), 811–3. https://doi.org/10.56093/ijas.v82i9.23837