求翻译：农田退水污染对黄河的水质安全影响越来越严重，退水污染主要来源于土壤硝态氮的淋失。因此，研究如何控制硝态氮淋失的技术成为保证黄河水质安全的主要途径。是什么意思？

Farmland retreat more and more serious water pollution on the Yellow River water quality and safety impact, the retreat of water pollution comes mainly from the leaching of soil nitrate. Therefore, how to control nitrate leaching technology to become the main way to ensure the safety of the Yellow R

Agricultural water pollution of the river water quality and safety effects are becoming more and more serious, and water pollution comes mainly from the gas nitrogen soil nitrates shower. Therefore, to study how to control nitrates nitrogen shower mentality of technology to ensure safe water quality

The farmland draws back the water pollution to be more and more serious to Yellow River's water quality safe influence, draws back the water pollution main origin in the soil nitric nitrogen leaching out.Therefore, how studies controls the nitric nitrogen leaching out the technology to become guaran

Annealing effects of water pollution of the Yellow River water quality safety of farmland growing back water pollution mainly comes from nitrate-nitrogen leaching in soil. Therefore, study of control of nitrate-nitrogen leaching technology became the main ways to ensure the safety of water quality o

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