returning farmland to forestry and grassland

• 退耕还林还草

returning farmland to forestry and grassland的用法和样例：

例句

1. Resource conditions and countermeasures implementing the strategy of returning the grain plots to forestry and grass on Loess Hilly Area.
   黄土丘陵沟壑区实施退耕还林还草战略资源条件与对策。