Canada is one of the largest agricultural producers and exporters in the world. As with other developed nations, the proportion of the population agriculture employed and agricultural GDP as a percentage of the national GDP fell dramatically over the 20th century, but it remains an important element of the Canadian economy. A wide range of agriculture is practised in Canada, from sprawling wheat fields of the prairies to summer produce of the Okanagan valley. In the federal government, overview of Canadian agriculture is the responsibility of the Department of Agriculture and Agri-Food. Major agricultural products Various factors affect the socio-economic characteristics of Canadian agriculture. The 2006 Census of Agriculture listed seven: Quantity and type of farms; Biogeography: crop and land use areas; land management practices; Quantity of livestock and poultry; Agricultural engineering: Farm machinery and equipment; Farm capital; Farm operating expenses and receipts; Farm-related injuries. Early in the 21st century, Canadian agronomists were aware of 48 "primary grain, vegetable and fruit crops", based on surface area and value. In 2007, the Canadian Federation of Agriculture broke down into five primary "production sectors" Canadian agriculture according to cash receipts: grains and oilseeds: 34% red meats – livestock: 24% dairy: 12% horticulture: 9% poultry and eggs: 8% In 2018, Canada was the world's largest producer of rapeseed (20.3 million tonnes), dry pea (3.5 million tonnes) and lentil (2 million tons), the 2nd largest producer of oats in the world (3.4 million tons), the 6th largest world producer of wheat (31.7 million tons) and barley (8.3 million tons), the 7th largest world producer of soy (7.2 million tons), the 10th largest world producer of maize (13.8 million tons) and the 12th largest world producer of potato (5.7 million tonnes). In the same year, the country also produced 688 thousand tons of flax, 505 thousand tons of sugar beet (which is used to produce sugar), 497 thousand tons of tomato, 424 thousand tons of apple, 354 thousand tons of carrots, 341 thousand tons of beans, 311 thousand tons of chickpeas, 236 thousand tons of rye, 240 thousand tons of onion, 219 thousand tons of cabbage, 195 thousand tons of cranberry, 164 thousand tons of blueberry, 173 thousand tons of mustard seed, 138 thousand tons of mushroom and truffle, 120 thousand tons of grape, in addition to smaller productions of other agricultural products. Grains and oilseeds In 1925, Saskatchewan produced over half of the wheat