indirect fertilizer

例句：

1. 1. In order to increase the yield of crops, farmers often use indirect fertilizers instead of directly applying chemical fertilizers.
   为了提高农作物的产量，农民经常使用间接肥料而不是直接施用化学肥料。
2. 2. The soil test showed that the soil was deficient in nitrogen and phosphorus, so the farmer decided to use an indirect fertilizer to supplement the nutrients.
   土壤测试结果显示土壤缺乏氮和磷，因此农民决定使用间接肥料来补充这些养分。
3. 3. The indirect fertilizer is a slow-release fertilizer that releases its nutrients over a longer period, which helps plants grow more efficiently.
   这种间接肥料是一种缓释肥料，其养分释放周期较长，有助于植物更有效地生长。