Abstract
This research aims at studying crop potato in area Talkaff in Nineveh Governorate, depending on the experimental data of 2011 for a specimen of (50)
farmers. The function of total expenses was estimated from which the function of median total expense was derived to calculate the optimal size which can achieve economic efficiency. It seems that the optimal size of the potato is 23.54 tone with actual size of the research specimen was 15.06 tons, so the farmers of this variety achieved only 63% of the size economy. But, the optimal size of the area which can exploitation to obtain the optimal size of production reached 13 donum. Accordingly, we recommend to expand of the planted areas to achieve size saving for their optimal sizes.
