而地面灌溉法的灌溉水常使各种盐分和化肥进入地下水源。
Water from above-ground irrigation system often carry salts and chemical fertilizers into such supplies.
负压灌溉法是一种新近提出的节水灌溉技术，灌溉时供水水头为“负值”，即灌溉水源高程低于灌水器高程。
Negatively pressurized irrigation (NPI) method, a newly irrigation technology, in which the elevation of the emitters is higher than that of the water source, runs under negative hydraulic head.
据BBC报道，皇家学会一份报告建议，要减轻作物病害的影响，应综合利用基因改造、灌溉改良和新种粮法。
The Royal Society has issued a report that suggests genetic modification, better irrigation and new systems of growing crops together to reduce the impact of plant diseases, according to BBC.
该法可供节水灌溉供水系统设计和运行时参考，类似的供水系统设计和运用时也可借鉴。
All of these can supply references for designing and running of the water-saving irrigating and supplying system as well as the similar water-supplying system.
基于田间实测的地表水流推进过程，利用水量平衡法推求波涌灌溉间歇供水条件下的土壤入渗参数。
Based on water flow advance data observed in fields, infiltration parameters under surge water application were determined with water balance method.
应用盆栽法研究了氯在烤烟中的分布以及土壤、施肥与灌溉水含氯量对烟叶氯含量与分布的影响。
Potted cultivation was used to study the chloride distribution in different tobacco plant organ, and the relation of chloride content with soil, applied fertilizer and irrigated water in tobacco leaf.
有五种方法用于水利灌溉：土地漫灌，垄沟灌溉，喷洒法，地下灌溉和滴灌法。
There are five methods of applying irrigation water to fields-flooding, furrow irrigation, sprinkling, sub-irrigation, and trickle irrigation.
有五种方法用于水利灌溉：土地漫灌，垄沟灌溉，喷洒法，地下灌溉和滴灌法。
There are five methods of applying irrigation water to fields-flooding, furrow irrigation, sprinkling, sub-irrigation, and trickle irrigation.
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