The method getting water in river from the foot of mountain in chilliness area;
寒冷地区山麓性河流取水方法探讨
In view of the special ecological conditions in high yield grain fields at Yanshan foot and production problems, an experiment was conducted from 1996 to 1999 in Tuanpiao town, Zunhua city, Hebei province about soil nutrient factors, their order, and concentrated fertilization index.
针对燕山山麓高产粮区特殊的生态条件及生产中存在的问题 ,1996～ 1999年在河北省遵化市团瓢庄乡进行了冬小麦—夏玉米轮作条件下土壤养分限制因子与排列序谱及高产、高效施肥指标的试验。