soil alkalinity

例句：

1. 1.Soil alkalinity is a critical factor in determining the suitability of a site for agriculture.
   土壤碱性是决定一个地点是否适合农业的关键因素。
2. 2. The soil alkalinity level needs to be monitored regularly to ensure proper plant growth.
   需要定期监测土壤碱性水平，以确保植物正常生长。
3. 3. To improve soil health, farmers often use organic fertilizers that are rich in nutrients and have low soil alkalinity.
   为了改善土壤健康，农民经常使用富含营养且具有低土壤碱性的有机肥料。