KUMAR, VIRENDRA, and I P S AHLAWAT. 2011. “Effect of Biofertilizer and Nitrogen on Wheal (Triticum Aestivuvm) and Their After Effects on Succeeding Maize (Zea Mays) in Wheat-Maize Cropping System”. The Indian Journal of Agricultural Sciences 76 (8). https://epubs.icar.org.in/index.php/IJAgS/article/view/3032.