OCEAN OF KNOWLEDGE

               ESSENTIAL AND BENEFICIAL ELEMENT   Most of the element present in soil can enter into plant, with the help of sensitive technique their can be detected through concentration is very low.     All the element present in soil but not essential all in plant body same case in animal body all element can not be required for growth and development.       CRITERIA FOR ESSENTIAL MINERAL ELEMENT     It is responsible for growth and development of plant.       A plant unable to complet his vegetative and reproductive phase with out presence of essential element.    The element can not replace by other element.    17 element or 16 element have been found to be essential they are C, H, O, N, Mg, Ce, Fe, B, Mn, Cu, Zn, Mo, Cl, and Ni   Other are called as non essential element.

                           Macro nutrient   These elements are required for plant in huge amount in the plant body .   It is very much required for growth and development in the plant body. They are those essential element which are present in easily detectable quantity 1-10 mg per gram of dry matter . Macro element are usually involved in the synthesis of organic molecules and development of osmotic potential of the cell . There are 9 element are present in the earth which are undergo in the macro nutrient. C, H, O, N, P, K, S, Ca, Mg. etc. are include in the macro nutrient. On fresh weight basic O2 is the most abundant element . On dry weight basis it is almost equal to carbon. Of the non essential function or beneficial element, silicon and sodium often occur in the range of macro nutrient.

                        MICRO NUTRIENT    These are those essential element which are required by the plant in small amount. Is equal to less then 0.1mg/gm of dry matter. These essentially came to be known only when extra pure salts were used in culture experiments.   Micro nutrient is mostly involves in the enzyme activator and co factor of the plant body.    These are include in 8 micronutrient present in the earth.    Fe, Zn, Mn, B, Cu, Mo, Cl, and Ni. Etc.