A. . SAIRAM, “Economic analysis of surface and sub-surface drip fertigated maize (Zea mays)–wheat (Triticum aestivum) system under different nutrient management practices and irrigation schedules”, Indian J Agri Sci, vol. 96, no. 1, pp. 33–39, Jan. 2026, doi: 10.56093/ijas.v96i1.162505.