化肥家族中的“小兄弟”在某供销社化肥仓库的一角，住着化肥家族中的一帮“小兄弟”。它们是微量元素铁、锌、锰、铜、硼、钼等。天刚一放亮，刚刚醒来的铁元素打着哈欠说：“新的一天又开始了，氮、磷、钾三位老大哥都下地干活去了，唯有咱们几个‘小兄弟’闲着没事干。... Fertilizer family in the “little brother” in a supply and marketing cooperatives fertilizer warehouse corner, living in a family of fertilizers in a bunch of “little brother.” They are trace elements of iron, zinc, manganese, copper, boron, molybdenum and so on. Just put a bright day, just waking iron element yawning said: "The new day has begun, nitrogen, phosphorus and potassium three big brother are working to go to the ground, and only we a few ’little brother’ Idle nothing to do ....