The approximately 20 chemical elements
known to be essential for the growth of living organisms, including nitrogen,
sulfur, phosphorus, and carbon.
Millennium Ecosystem Assessment
Micronutrients are essential nutrients that plants, humans,
and animals need in very small amounts to grow, thrive, and stay healthy. They
include vitamins and trace minerals such as iron, copper, and zinc.
Environmental cycles - Eutrophication - Nutrient loading
Français: Eléments nutritifs