The result indicates that there are obvious differences between irrigation with spate and clear water in large irrigation norm.
研究结果表明,在大灌水定额下,清、洪水灌溉差异明显。
The irrigation norm for the highest benefits is related closely to water production function, cotton price, water charge, other production costs, and the way of collecting water charge.
节水经济灌溉定额不仅与棉花水分生产函数有关,而且与皮棉价格、单方水价格、生产要素不变费用及水费征收方式有关。
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