water efficiency in field

Displacement characteristic curve is an important method used in reserv-oir engineering. It can be used to predict the reservoir performance of a water drive reservoir and to predict recovery efficiency of oil field as well.

水驱曲线法是油藏工程中的一个重要方法，它不仅能够预测水驱油藏的开发动态，而且也能预测油田的采收率。

Field experiments were conducted in Heyang, Shaanxi Province from 1992 to 1995 to study the effects of fertilizer application and mulch straw on water use efficiency ( WUE) of winter wheat and spring sunflowers.

1992～1995年，在陕西省合阳旱地进行了施肥和秸秆覆盖对冬小麦、春向日葵水分利用效率影响试验。

In consideration of thermochemical method in demulsification of high water-content crude oil, the influences of temperature and quantity of demulsifier on the demulsification efficiency and demulsification velocity were investigated. Study on Demulsification Rate Under High Voltage Electric Field

针对高含水原油破乳中广泛采用的热化学法，试验研究了加热温度、加入破乳剂量对破乳效果和破乳速率的影响。水/油型乳液的高压电破乳速率的研究

By increasing efficiency of water use and fertilizer resources, and gaining highly potential dryland output, average food per product in 15 years reached 4 100 kg/ km 2, thus food could be self support basically with one person only possessing 733 m 2 dryland field;

根据不同降水年型旱作生产力的特性，提高水肥资源的利用效率，实现旱作产量潜势的高实现率，15a平均粮食单产达到4100kg/km2，在人均旱作粮田仅为733m2的条件下，做到粮食基本自给；