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卢龙县位于河北省东北部,地处燕山南麓,长城脚下,属低山丘陵旱作农区。年均降水量724.5毫米,75%集中在夏季。年平均气温10.7℃,年均≥10℃的积温3940℃,无霜期169天,是冬小麦种植区的北部边缘地带。近几年来,小麦种植面积已发展到10万亩,占粮食作物播种面积的18.5%,并连年取得好收成。单产由1988年的198.7公斤提高到1991年的297.1公斤,平均年递增16.5%。其主要作法是:
Lulong County is located in the northeast of Hebei Province, is located south of Yanshan, the foot of the Great Wall, a hilly dry farming areas. The average annual rainfall 724.5 mm, 75% concentrated in the summer. The annual average temperature of 10.7 ℃, the average annual temperature of ≥10 ℃ 3940 ℃, frost-free period of 169 days, is the northern fringe of winter wheat growing areas. In recent years, the area under wheat cultivation has grown to 100,000 mu, accounting for 18.5% of the sown area of food crops and a good harvest has been achieved year after year. The yield increased from 198.7 kg in 1988 to 297.1 kg in 1991, with an average annual increase of 16.5%. The main approach is: