& et al. T. ESTIMATING ECONOMICAL COSTS FOR OPERATING AGRICULTURAL MACHINES AND EQUIPMENT DURING PLOWING OPERATIONS. Iraqi J. Agric. Sci. [Internet]. 2016 Feb. 25 [cited 2024 Apr. 28];47(1). Available from: https://jcoagri.uobaghdad.edu.iq/index.php/intro/article/view/642