water quality standard for irrigation

例句：

1. 1.The government has set a water quality standard for irrigation that must be met to ensure the health of crops.
   政府已经设定了一个灌溉用水质量标准，必须达到这个标准才能保证作物的健康。
2. 2.To improve the quality of water used for irrigation, farmers need to use more efficient irrigation techniques.
   为了提高灌溉用水的质量，农民需要使用更有效的灌溉技术。
3. 3. The water quality standard for irrigation is crucial in preventing soil erosion and maintaining soil fertility.
   灌溉用水质量标准对于防止土壤侵蚀和保持土壤肥力至关重要。