The transport and fractionation of copper (Cu) were investigated in three soils which were under continuous citrus production for over 30 years. The above soils received 50 kg Cu ha⁻¹, and were leached with eight pore volumes of water (equivalent to a total of 91 cm of rainfall). Following the completion of leaching, the leaching columns were sectioned into 5 cm depth increments for analyses of soil Cu. Concentrations of different forms of soil Cu were analyzed using a sequential fractionation procedure. The leaching column study indicated as much as 98% of the applied Cu remained in the upper 5 cm of the soil despite leaching eight pore volumes of water. Copper recovered in eight pore volumes of leachate accounted for 0.18–2.87% of Cu applied. The organically bound and precipitated forms of Cu accounted for 33–87% and 6–44% of total soil Cu, respectively.

在连续生产柑橘超过30年的三种土壤中研究了铜的运输和分馏。以上土壤接受50 kg Cu ha ^-1，并用八孔体积的水淋洗（相当于91厘米的总降雨量）。浸出完成后，将浸出柱切成5厘米深度的增量，用于分析土壤铜。使用顺序分馏程序分析了不同形式的土壤Cu的浓度。浸出柱研究表明，尽管浸出了八个孔体积的水，但仍有多达98％的应用Cu残留在土壤的上部5 cm。从八个孔隙体积的浸出液中回收的铜占施铜量的0.18–2.87％。铜的有机结合和沉淀形式分别占土壤总铜的33–87％和6–44％。