The 1981 Census of Agriculture was conducted on June 3, 1981. Census farm is defined in the 1981 Census of Agriculture as a farm, ranch, or other agricultural holding with sales of agricultural products during the past 12 months of $250 or more. Operations, which anticipated sales of $250 or more in 1981, were also included. All tabulated data are subject to confidentiality restrictions prior to release. Due to confidentiality constraints, data for those geographic areas with very few agricultural operations are not released separately, but rather merged with a geographically adjacent area.