books.google.co.uk - Due to the adverse stress conditions typical of olive cultivation in desert conditions, the olive tree is responding with production of high levels of antioxidant substances. Among these substances are polyphenols, tocopherols, and phytosterols. Studies have shown that saline irrigated varieties of olives...http://books.google.co.uk/books/about/Desert_Olive_Oil_Cultivation.html?id=gM1Bt1Oph10C&utm_source=gb-gplus-shareDesert Olive Oil Cultivation