1·Irrigating water quota has a remarkable effect on leaf area and plant height.
灌水定额对夏玉米叶面积和株高有显著影响。
2·The studies show the groundwater level is rising quickly and may surpass the critical depth along downstream area with the extension of the irrigating field, which can bring on the soil salinization.
研究表明：该区随灌溉面积的扩大，地下水位上升迅速，灌区下游水位将超过临界埋深，从而引起土壤次生盐渍化。
3·Low dam is a diversion irrigating method adopted generally in irrigated area.
低坝是灌区引水灌溉普遍采用的一种形式。
4·Proposes that for central plain area using water source heat pump unit, solving the issues of irrigating well water back for different geological area must be emphasized.
同时提出了中原地区使用水源热泵机组时，着重注意不同地质井水回灌的解决问题。
5·The improvement of ground irrigation techniques is a key problem for the irrigated area to increase the quality of irrigating water and practice rated water consumption.
改进地面灌水技术，是灌区提高灌水质量、实行定额用水的关键问题。