Qamaruzzaman, Q., Nathani, G. P., Singh, L. R., & Seth, S. P. (2016). Economics of Tillage Operation for Rainfed Jowar under Medium Black Soils of Chambal Command Area. Annals of Arid Zone, 16(4). https://epubs.icar.org.in/index.php/AAZ/article/view/64761