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.
What are Arizona's natural resources? Quick Answer. Arizona is abundant in water and metals, such as gold, copper and silver. Most of the copper mining in the United States takes place in Arizona; its rich copper deposits exceed all of the other states' copper deposits combined. Continue Reading.