HEGDE, D. M., & KATYAL, V. (2013). Long-term effect of fertilizer use on crop prductivity and soil fertility in maize (zea mays)-wheat (Triticum aetivum) cropping system in two soil types. The Indian Journal of Agricultural Sciences, 68(2). https://epubs.icar.org.in/index.php/IJAgS/article/view/27302