cropland conversion into forest

• 退耕还林

cropland conversion into forest的用法和样例：

例句

1. No entity or individual may designate suppliers of seeds or saplings for the parties restoring farmland to forest.
   任何单位和个人不得为退耕还林者指定种苗供应商。
2. The program of the converting farmland into forest is a big systems engineering,which involes broad converage, invests much money and has high participation of farmers.
   退耕还林是一项庞大的系统工程，覆盖面广，投资多，农民参与程度高。