| http://www.w3.org/ns/prov#value | - The method calculated for the net benefit of the agricultural user in Hejing County can be applied to other users, districts and even other economic data. is a basic form of trading cost, which is estimated by the actual price of water exceed water permit in Kaidu-kongque Basin. is estimated according to the opportunity cost of water, which is affected by a number of factors, such as the scarcity
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