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.
Southeast Asia. 1. Which country has the greatest variety of major mineral resources? 2. Which country has only gemstones as a mineral resource? 3. Which country is the only one to produce silver? 4. The most important non-metallic mineral resource is? 5. What is the most important and most frequent meta| resource produced?