Oasis soils result from the combined action of natural and anthropic processes, and thus constitute valuable systems for the understanding of human–environment trajectories over the millennia. The present research aims to develop the study of ancient oasis soils by identifying proxies to detect past agricultural practices. Ten reference pits were dug in Masafi, in both cultivated plots (irrigated plots with palm trees/fruit trees/cereals; manure/ashes/carbonates) and abandoned ones. Bulk sediment samples were analysed for geochemistry/pedo‐sedimentary studies: inductively coupled plasma‐optical emission spectrometry, loss on ignition, pH, electrical conductivity, grain size and magnetic susceptibility. This multiproxy approach enabled the creation of a soil typology of oasis agricultural modes. Irrigation and liming lead to salinisation, particularly in a B‐horizon. Manure creates a hortic horizon, enriched in P and Zn. Ashes can be detected with a simultaneous increase of magnetic and salinity values. Soils in plots with fruit trees/cereals are not distinguishable from those with palm monoculture. Weathering was identified on the basis of the enrichment in Al, Ti, K Na, Ni, Cr and Fe, whereas proxies of ancient practices seem to be preserved after 15 years of abandonment. As leaching processes appear to be limited to the first 50 cm, the durability of soil signatures depends on how they were buried.

中文翻译：

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用于在干旱环境中识别和研究古代耕作土壤的绿洲土壤参考收藏品（阿拉伯联合酋长国的马萨菲绿洲）

绿洲土壤是自然过程和人为过程共同作用的结果，因此构成了了解千年以来人类环境轨迹的有价值的系统。本研究旨在通过识别代理来检测过去的农业实践，从而发展对古代绿洲土壤的研究。在Masafi挖了10个参考坑，既有耕地（有棕榈树/果树/谷物的灌溉地；肥料/灰烬/碳酸盐）也有废弃地。分析了大块沉积物样品的地球化学/沉积沉积研究：电感耦合等离子体发射光谱法，灼烧损失，pH，电导率，晶粒度和磁化率。这种多代理方法可以创建绿洲农业模式的土壤类型。灌溉和石灰导致盐碱化，特别是在B地平线中。肥料会形成一个充满磷和锌的地层。可以同时增加磁和盐度值来检测灰烬。没有果树/谷物的地块的土壤与只有棕榈单作的土地的区域没有区别。根据铝，钛，钾钠，镍，铬和铁的富集确定了风化作用，而废弃15年后似乎保留了古代习俗的代理。由于浸出过程似乎仅限于最初的50厘米，土壤特征的持久性取决于它们的掩埋方式。根据铝，钛，钾钠，镍，铬和铁的富集确定了风化作用，而废弃15年后似乎保留了古代习俗的代理。由于浸出过程似乎仅限于最初的50厘米，土壤特征的持久性取决于它们的掩埋方式。根据铝，钛，钾钠，镍，铬和铁的富集确定了风化作用，而废弃15年后似乎保留了古代习俗的代理。由于浸出过程似乎仅限于最初的50厘米，土壤特征的持久性取决于它们的掩埋方式。