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黑龙江省东部森林石质低山侵蚀区(本文简称东部山区)属张广才岭,老爷岭和完达山脉的低山丘陵,海拔400—800米,地形起伏,古代侵蚀切割较深,基岩主要为花岗岩等,风化甚烈。全区总土地面积1.4632亿亩,其中耕地2564万亩,林地8450万亩,水面727万亩,其它占地约785万亩。人口803万人,其中农业人口462万人,每平方公里70—80人,人均耕地3.2亩。
The stony and low mountainous erosion area of the eastern part of Heilongjiang Province (referred to as the eastern mountainous area in this paper) belongs to the hilly hills of Zhangguangcailing, Laoyeling and Wandashan at altitudes of 400-800 meters above sea level. The terrain is undulating and the ancient erosion and cutting are deep. The bedrock is mainly For granite, very weathered. The total land area of 146.56 million mu, of which 25.64 million mu of arable land, 84.5 million mu of woodland, water 7.27 million mu, the other covers an area of about 7.85 million mu. The population of 8.03 million, of which agricultural population 4.62 million, 70-80 people per square kilometer, 3.2 acres of arable land per capita.