Only 16 or so elements are truly essential for plant growth. The rest of the elements present in plant tissue are largely taken up in small quantities incidentally (or accidentally!) as plants take up the nutrient elements that they need for growth and reproduction.
Turkey has the largest economy in the region, followed by Saudi Arabia and Iran. Petroleum is the major industry in the regional economy, as more than half of the world's oil reserves and around 40 percent of the world's natural gas reserves are located in the region.
10 It is the largest private producer of oil in Kazakhstan, the top oil and gas producer in Thailand, the largest holder of undeveloped natural gas resources in Australia, among the largest holders of deepwater acreage in Nigeria, and it holds leases in the deepwater of the Gulf of Mexico.