含水土层

例句：

1. 1. The soil moisture layer is crucial for plant growth.
   土壤水分层对植物生长至关重要。
2. 2. The farmer carefully monitored the soil moisture layer to ensure proper irrigation.
   农民仔细监测土壤水分层，以确保适当的灌溉。
3. 3. The research team studied the soil moisture layer to understand its impact on crop yields.
   研究团队研究土壤水分层，以了解其对作物产量的影响。