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. 

               SOIL AS A NUTRIENT RESERVOIR -Soil colloids serve to maintain a reserve of soluble nutrient in the soil. - the colloid compound of soil consisting of clay particle and humus. - sand, slit and clay which are difference on the basis of particle size from the mineral compound in the soil -A part from clay,also contain a colloidal carbonaceous residue called humus. -Humus is an organic materiel that has been slowly but incompletely degraded to a colloidal dimension through the action of weathering and micro organism which make great contribution to the nutrient reservoir  

                          BIOTIC NATURAL RESOURCES           Biotic resources  are  resources  derived from the biosphere such as living things and from forest and the materials derived from them. This mainly include fossil fuels like petroleum, coal gas, etc.

                                     NATURAL RESOURCES Definition --------------                      Natural resources are are resolved that existing without action of human mankind. - This includes all valued characteristics such as magnetic, gravitational, electrical properties and force etc. - On Earth it includes sunlight, atmospheric water, land along with all vegetation, crop that animal like there that naturally subsist upon or within the heretofore characteristics in substance.                                                                Natural research may exist age a separate entity such as fresh water, air & as well as  living organism such as a  fresh o...

ABIOTIC NATURAL RESOURCES  Abiotic  means other than living things that mean non-living things examples are fresh air, land ,heavy metal. -Abiotic natural resources is also called as non living resources.