coarse grain zone

例句：

1. 1. The coarsegrain zone is where the soil is verysandy and has a lot of nutrients.
   粗粒带是土壤非常沙质且富含养分的地方。
2. 2. In this region, thecoarse grain zone is characterized by its highrainfall and fertile soil.
   在这个地区，粗粒带以其高降雨量和肥沃的土壤而著称。
3. 3. Coarse grain zones areimportant for agriculture because they providegood soil structure and drainage.
   粗粒带对农业非常重要，因为它们提供了良好的土壤结构和排水。