superphosphate rate

例句：

1. 1. The soil test showed that the superphosphate rate was too high, which could damage the plants.
   土壤测试显示，超磷酸盐施用量过高，可能会损害植物。
2. 2. To improve crop yield, farmers need to adjust their superphosphate rates accordingly.
   为了提高作物产量，农民需要相应调整超磷酸盐施用量。
3. 3.Superphosphate is an essential nutrient for plant growth, and its rate should be carefully monitored.
   超磷酸盐是植物生长的必需养分，其施用量应仔细监测。