The acreage of improved farmland is small. It devotes 7.3% of its total land acreage to parkland. This advantage has resulted in increased irrigated acreage and water use in some areas. The estate is primarily agricultural with a substantial acreage of woodland. The land is part of the acreage owned by the Edmonton International Airport. Texas has the most farms and the highest acreage in the United States. Almost doubled compared with the prewar decreased acreage and yield of crops. The national park is divided into 15 parcels of various acreage. For current crops and their acreage under cultivation, see genetically modified crops. States with extensive agricultural acreage may have many hundred to thousands of canals. The upland acreage of the island is approximately . The school continued to operate and farm the surrounding acreage up until World War II. The cultivated acreage and the number of households engaging in agriculture is however declining. The vast majority of plantations did not have grand mansions centered on a huge acreage. About 65 percent of the forest acreage is located in Skamania County.