Crop yields are painfully low, but improving production of staples demands emissions-heavy fertilizer and irrigation technologies.
作物产量低得可怜，但若想提高粮食产量，就需要使用排放严重的肥料和灌溉技术。
In hilly areas, water pumping irrigation lift is high, and the irrigation water fee is high because of the high pumping cost, so the burdens on farmers are very heavy.
丘陵地区提水灌溉需要的扬程高，水费占灌溉成本的比重大，农民的负担很重。
The pollution levels of heavy metals and the relations between they and irrigation types was studied in top soils of different irrigation types in Xi an City.
以西安市不同灌溉类型的农田土壤为对象，研究重金属污染现状及其与灌溉类型的关系。
Effects of soil sodicity and gypsum application on dynamical behavior of heavy metal elements under effluent irrigation were studied by means of soil column leaching method in laboratory.
采用室内土柱淋洗试验方法，研究了污水灌溉条件下土壤碱度和石膏应用对土壤中重金属元素动态变化的影响。
The content of soil heavy metals and shallow underground water quality were not greatly influenced by making use of the renovated water for irrigation.
使用再生水对土壤中重金属含量及示范区浅层地下水水质未造成明显影响。
Field experiments were conducted to study the impact of rejuvenated water irrigation on the quality of tomato, the heavy metal element in fruit and soil.
通过田间试验，分析了再生水灌溉对番茄果实品质、重金属以及土壤重金属的影响。
Drought is the biggest disturbance of dependable crop and heavy-producing grain output to the irrigation district.
通过这些指标说明干旱是关中灌区难以实现稳产、高产最大的障碍。
Currently, the heavy metals pollution caused by irrigation is paid more and more attention.
目前，由污灌引发的重金属污染问题受到越来越多的关注。
It provide reference for the design of pumping irrigation works on the heavy silt carrying rivers.
可供多泥沙河流电力提灌工程设计参考。
It provide reference for the design of pumping irrigation works on the heavy silt carrying rivers.
可供多泥沙河流电力提灌工程设计参考。
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