slowly available potassium

例句：

1. 1. The soil is slowly available potassium, which is essential for plant growth.
   土壤中的慢速可利用的钾对植物生长至关重要。
2. 2.Slowly available potassium can help plants adapt to changing conditions.
   慢速可利用的钾可以帮助植物适应不断变化的条件。
3. 3. In agriculture, the availability of slow-release fertilizers containing potassium is crucial for crop yield.
   农业中，含有钾的缓释肥料的可用性对于作物产量至关重要。