从数理经济学观点出发，研究了以资源边际产量为条件的经济用水定额，提出了华北地区不同水文年的各种作物经济用水定额。
From the viewpoint of mathematical and economic theories, the economic water use quota was studied based on the minimum resource input and maximum output.
从数理经济学观点出发，研究了以资源边际产量为条件的经济用水定额，提出了华北地区不同水文年的各种作物经济用水定额。
From the viewpoint of mathematical and economic theories, the economic water use quota was studied based on the minimum resource input and maximum output.
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