soil fertility map

例句：

1. 1. To improve soil fertility, farmers need to apply organic fertilizers regularly.
   为了提高土壤肥力，农民需要定期施用有机肥。
2. 2. The soil fertility map shows the areas with high and low fertility levels.
   土壤肥力地图显示了高肥力和低肥力区域。
3. 3. The government has launched a project to create soil fertility maps for all regions.
   政府已经启动了一个项目，为所有地区制作土壤肥力地图。