The method was used to synthetically evaluate agricultural resources use efficiency of 81 counties in Gansu province, and the results were classified.
利用该方法对甘肃省81个县域单元的农业资源利用效率进行综合评价，并对综合评价结果进行分级。
The application result showed that the model can realize conjunctive use of surface water and underground water in deed and improve water resources use efficiency.
实例计算表明：应用此模型指导井渠结合灌区的水资源配置可实现真正意义上的地表水和地下水联合运用，提高水资源利用效率。
Agricultural labor force aging; Land resources use efficiency; Inverted "u" type curve.
农业劳动力老龄化；土地资源利用效率；倒“U”型关系。
Agricultural labor force aging; Land resources use efficiency; Inverted "u" type curve.
农业劳动力老龄化；土地资源利用效率；倒“U”型关系。
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