<Tr> <Td> raw long - grain brown rice </Td> </Tr> <P> Harvested wheat grain that enters trade is classified according to grain properties for the purposes of the commodity markets . Wheat buyers use these to decide which wheat to buy, as each class has special uses, and producers use them to decide which classes of wheat will be most profitable to cultivate . </P> <P> Wheat is widely cultivated as a cash crop because it produces a good yield per unit area, grows well in a temperate climate even with a moderately short growing season, and yields a versatile, high - quality flour that is widely used in baking . Most breads are made with wheat flour, including many breads named for the other grains they contain, for example, most rye and oat breads . The popularity of foods made from wheat flour creates a large demand for the grain, even in economies with significant food surpluses . </P> <P> In recent years, low international wheat prices have often encouraged farmers in the United States to change to more profitable crops . In 1998, the price at harvest of a 60 pounds (27 kg) bushel was $2.68 per . Some information providers, following CBOT practice, quote the wheat market in per ton denomination . A USDA report revealed that in 1998, average operating costs were $1.43 per bushel and total costs were $3.97 per bushel . In that study, farm wheat yields averaged 41.7 bushels per acre (2.2435 metric ton / hectare), and typical total wheat production value was $31,900 per farm, with total farm production value (including other crops) of $173,681 per farm, plus $17,402 in government payments . There were significant profitability differences between low - and high - cost farms, mainly due to crop yield differences, location, and farm size . </P>

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