At present, nitrogen pollution in the groundwater caused by fertilizer irrigation in the agricultural area has become an environmental problem of interest to the people.
当今农业地区灌溉施肥引起氮素对地下水的污染已成为人们普遍关注的环境问题。
2
These researches have laid a foundation for efficiently utilizing nitrogen in film hole irrigation.
以上研究为膜孔灌溉农田氮素高效利用研究奠定基础。
3
The low rate of sowing, wide space between rows, proper amount of nitrogen and phosphorous and a timely irrigation also had good effect on seed production of sainfoin.