Abid, M., S.- ur-. Rehman, and S. Hussain. “TILLAGE PRACTICES AND NITROGEN APPLICATION INFLUENCED SOIL PHYSICAL PROPERTIES AND WHEAT PRODUCTION”. Advances in Agriculture and Animal Sciences, vol. 30, no. 1, June 2014, pp. 75-84, https://sau.edu.pk/pjaaevs/index.php/ojs/article/view/172.