long term manuring

例句：

1. 1.Long-term manuring is essential for maintaining soil fertility and crop yield.
   长期施肥对于保持土壤肥力和提高作物产量至关重要。
2. 2. Farmers often use chemical fertilizers to promote plant growth, but long-term manuring is also an effective way to improve soil quality.
   农民通常使用化学肥料来促进植物生长，但长期施肥也是一种有效改善土壤质量的方法。
3. 3. In addition to chemical fertilizers, farmers should also consider long-term manuring practices to maintainsoil health and productivity.
   除了化学肥料外，农民还应该考虑长期施肥实践，以维护土壤健康和生产力。