The principal crops in the early years of the 20th century were barley, oats and wheat. Sixty per cent of the land was tillable, and the remainder afforded good grazing. As of 1920, the headgates of the Lower Yellowstone Irrigation Project, which irrigated approximately 90,000 acres, were located at Intake, in Dawson County, and further irrigation was planned. Unirrigated land was also producing excellent crops, with up to 400 bushels of potatoes in one acre of unirrigated land. In 1915, Dawson County won first and second prizes on Northwestern Dent corn at the St. Paul Corn Show, and in December of the following year, at the First National Corn Show, held at the same city, took first and second prizes and three third prizes. In 1920, it was estimated that the acreage planted in corn in Dawson County alone was as great as the corn acreage for the entire state in 1910.