rationed grazing

例句：

1. 1.The government has implemented a policy of rationed grazing to control the number of livestock on the farms.
   政府实施了一项政策，对农场的牲畜实行定量放牧以控制数量。
2. 2.The farmers have been rationed grazing for several months due to drought conditions in the region.
   由于该地区的干旱条件，农民们已经实行了几个月的定量放牧。
3. 3. The rationed grazing system has helped to reduce overgrazing and improve soil health.
   定量放牧制度有助于减少过度放牧并改善土壤健康。