高寒山区播绿人———记渭源县园艺站站长、农艺师周希颐同志○乔海珍在高寒阴湿冷凉的渭源县乡村，经常走着一位中等身材的“老农技”、“老推广”、他身板结实硬朗，衣着朴素，态度乐观。他总是不畏艰辛，穿梭操劳，或手把手示范操作，育苗、嫁接、防虫、防病，或频频讲... Algae mountain sowing green --- remember Weiyuan County gardening station director, agronomist Zhou Xianyi ○ Qiao Haizhen cold and humid in the cold Weiyuan County countryside, often walked a medium-sized “old farming skills”, “old Promotion ”, he was tough and tough, dressed simple, optimistic attitude. He is always afraid of hardships, shuttlecock, or hands-on demonstration operation, nursery, grafting, pest control, disease prevention, or frequently say ...