Grapefruit and shaddock essential oils (EOs) have remarkable biological activities. Soil types are characterized by various properties which affect the essential oils of grapefruit and shaddock. Many Citrus species are cultivated in the Nile Valley of Egypt, which is characterized by its clay soil, but there are no large areas cultivated with both grapefruit and shaddock. The reclaimed desert in Egypt which characterized by sand soil is expanded by planting many Citrus species, which produce different residues such as leaves, flowers, and peels rich in essential oil, which is used in the production of natural raw materials as a source for medicine and food. Thus, the variations of grapefruit and shaddock essential oils and their constituents were evaluated under sand and clay soils to find out the extent of the opportunities for expanding their cultivation in the new reclamation region as a natural source of EO. The leaves, flower, and peel EOs of grapefruit and shaddock were isolated by hydro-distillation and analyzed by gas chromatography and gas chromatography/mass spectrometry; data were statistically analyzed by one-way analysis of variance. Samples collected from trees grown in sand soil produced the greatest amounts of essential oil in both species whatever the organ from which this oil was extracted. Limonene was of the major compound in both peel and flower grapefruit essential oils, while sabinene was the predominant one in leaves EO (39.8% and 44.8%, in clay and sand soils respectively). E-phytol, linalool, and limonene were the predominant constituent in leaves, flower, and peel of shaddock essential oil, respectively. Various identified constituents in leaves, flowers, and peels noteworthy the presence of oxygenated diterpenes in percentage not less than 33% in leaves shaddock essential oil which was completely omitted in the other organs and in the grapefruit EOs. The monoterpene hydrocarbon was the major chemical class in various essential oils of grapefruit; oxygenated diterpenes, oxygenated monoterpenes, and monoterpene hydrocarbon were the main chemical classes of leaves, flower, and peel essential oils from shaddock, respectively. In the essential oil contents (%), most of the main constituents and major chemical groups were higher under sand soil than clay soil. This study serves as a reference for selection the suitable soil to produce the essential oil according to the components of interest; also, this trial recommends the cultivation of both species in reclaimed sand soil of Egypt.

葡萄柚和柚子精油（EOs）具有出色的生物活性。土壤类型具有影响葡萄柚和柚子精油的各种特性。埃及的尼罗河谷以黏土为特色种植了许多柑橘类物种，但没有大面积种植葡萄柚和柚子的地方。埃及以沙土为特征的开垦沙漠通过种植许多柑橘而得到扩展这些物种会产生不同的残留物，例如叶子，花朵和富含精油的果皮，可用于生产天然原料，作为药品和食品的来源。因此，在砂土和粘土下评估了柚子和柚子精油及其成分的变化，以发现在新的垦区作为EO的天然来源扩大其种植机会的程度。通过水蒸馏分离柚子和柚子的叶，花和果皮的EOs，并通过气相色谱和气相色谱/质谱法进行分析。数据通过单向方差分析进行统计分析。无论从哪种植物中提取油，从在沙土中生长的树木收集的样品在两种物种中产生的精油量均最大。电子柚子精油的叶，花和果皮中的主要成分分别为植醇，芳樟醇和li烯。叶片，花朵和果皮中的各种鉴定出的成分值得一提，在叶片柚子精油中存在不少于33％的氧化二萜，而在其他器官和柚子EO中则被完全省略了。单萜碳氢化合物是葡萄柚各种香精油中的主要化学类别。含氧的二萜，含氧的单萜和单萜碳氢化合物分别是柚子叶，花和果皮精油的主要化学类别。在精油含量（％）中，砂土下的大多数主要成分和主要化学基团都比黏土高。该研究可为根据感兴趣的成分选择合适的土壤生产精油提供参考；此外，该试验还建议在埃及的再生沙土中种植两种树种。