Definition and Function of Nutrient
Plants need food are often called plant nutrients. In contrast to humans who use organic materials, the plant uses inorganic materials for energy and growth.
With photosynthesis, plants accumulate very low levels carbon in the atmosphere, plus water that is converted into organic matter by chlorophyll with the help of sunlight. Absorbed elements for plant growth and metabolism is called plant nutrients. The mechanism of change in nutrient or energy into organic compounds called metabolism.
By using the nutrients, plants can meet their life cycle. Functions of plant nutrients can not be replaced by other elements, and if there is not a plant nutrient, the metabolic activity would be disrupted or stopped altogether.
Each plant requires at least 16 elements or substances for normal growth, of 16 elements, three elements (C, O, H) is obtained from the air, and 13 other elements obtained from the soil (N, P, K, Ca, Mg, S, Cl, Fe, Mn, Cu, Zn, B, Mo). 13th element of the element that is taken only six plants in bulk (macro elements), namely N, P, K, S, Ca, and Mg.