农业用水效率较低。
在今天的中国，农业用水的利用效率约为30%-40%。
In China today, the utilization efficiency of farming water is about 30-40 percent.
世界粮农组织认为，如果用水效率不加以改观，世界对农业的水需求要增加60%，才足够喂养多出的20亿张嘴巴。
The Food and Agriculture Organisation reckons that, without changes in efficiency, the world will need as much as 60% more water for agriculture to feed those 2 billion extra mouths.
随着人均可用水量的不断下降，灌溉农业必须提高水资源利用效率，同时进一步采用有利于环境的经营和管理方式。
As per capita water availability decreases, irrigated agriculture will have to be more efficient in water use as well as more environment friendly in operation and management.
在特殊的气候环境下，提高作物用水的效率将大大提高农业生产的产量，经济效益将大幅度提高。
Crops yield will be increased and the economic performance will increase also if efficiency of water increase under the special weather environment condition.
研究结果表明，黑龙江省农业耗水量最大却效率低下，用水成本高，经济效益差；
The study result showed that the water consumption of agriculture was higher, but the water use efficiency was lower, the cost was not economical, the economic benefit was poor;
与发达国家相比，我国农业用水量大且效率很低。
Comparing with the developed countries, the agricultural water in China is large and its efficiency is very low.
目前由于农业用水价格严重背离价值，导致农业用水的利用效率低下、浪费严重。
At present, because the price of agricultural irrigation water deviates from its value greatly, it leads to that agricultural irrigation water is utilized low-efficiently and wasted seriously.
对农业灌溉用水进行了探讨，从水分生产效率和水分利用效率来看，与发达国家相比都还有较大的差距。
Compared with developed countries, we still have a long way to go in water productivity and utilization ratio.
对农业灌溉用水进行了探讨，从水分生产效率和水分利用效率来看，与发达国家相比都还有较大的差距。
Compared with developed countries, we still have a long way to go in water productivity and utilization ratio.
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