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Germany is one of the major EU powers in agricultural production ,Fertile farmland mainly grow wheat , barley , maize and sugar beet , barren land is mainly planted rye , oats, potatoes and fodder beet . German agricultural output accounted for about 1% of GDP , agriculture accounts for about 4% of the total employed labor force, has a highly developed agriculture , more than 80 percent of agricultural products can be self-sufficient, but also for some of the imported varieties or adjust the price factor .Germany has a long history of grape cultivation , wine world famous. Most of the grapes grown on the slopes ( 60% ) , the rest of the valley or the plains . On the Rhine , and the middle reaches of the River Main , Neckar , Moselle and Elbe downstream of the upstream region are famous grape producing areas. National grape acreage of 107,000 hectares , there are 77,388 farms growing grapes , fewer large farms .German hops per hectare yield substantially between 1500 and 2000 kg ,Nearly 70 percent of German hops exported to more than 100 countries.German government statistics, in 2007 , the country's total land area of 11.89 million hectares ,Grain acreage was 6.58 million hectares , grain output was 40.58 million tons ; where wheat planting area of 300 million hectares, production was 20.93 million tons ; barley acreage was 1.93 million hectares , production was 10.48 million tons ; rye acreage 41 million hectares, production was 2.18 million tons ; corn acreage is 380,000 ha , the yield was3.56 million tons .Oilseed crops, mainly rapeseed, sunflowerSeed . According to statistics, in 2007 , rapeseed acreage of 1.55 million hectares , production was 5.3 million tons , with an average yield of 3.43 tons per hectare ; sunflower acreage of 190,000 hectares , production was 48,000 tons , with an average yield 2.52 tonnes per hectare .Germany is the world's largest producer and consumer of biodiesel . In 2007 , biodiesel production is estimated at 500 million tons, equivalent to 16 % of total domestic demand for diesel , significantly higher than2006 of 2,600,000 tons and 1,000,000 tons in 2005 . German biodiesel feedstockMainly rapeseed .