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The sediment discharge of rivers with cultivated waste land of dry farm, population density are indirect proportion, it with forest cover degree, per capita output of grain are inverse proportion.
河流输少量与旱坡耕地垦殖率、人口密度成正比，与森林覆盖率、人均占有粮食成反比。
The pressure index of cultivated land is the ratio of per capita minimal area of cultivated land and per capita actual area of cultivated land.
耕地压力指数是指最小人均耕地面积与实际人均耕地面积之比。
Heilongjiang Province is an important major grain-producing area, and the per capita share of cultivated land in China takes the first place.
黑龙江省是我国重要的粮食主产区，耕地面积和人均占有量都居我国首位。
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