SINGH, M. K., PAL, S. K., THAKUR, R., & VERMA, U. N. (2013). Integrated nutrient energy management for sustainability in maize (Zea mays) - wheat (Triticum aestivum) cropping system. The Indian Journal of Agricultural Sciences, 68(12). https://epubs.icar.org.in/index.php/IJAgS/article/view/27834