近20年陇东黄土高原耕地撂荒及其驱动力——以甘肃省平凉市崆峒区为例<sub>*</sub>
Farmland Abandonment on the Loess Plateau of Longdong Region During the Past 20 Years and Its Driving Force: A Case Study of Kongtong District, Pingliang City, Gansu Province
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