C, H, O, P, K, N, S, Ca, Fe, Mg, Cu, Mn, Ni, Zn, Mo, B, Cl.
♣ C HOPKiNS CaFe is Mighty good CuMn Nick Zn before MoB Closes it.
(See Hopkins Cafe is mighty good, common Nick join before mob closes it).
Plant nutrition includes elements of biological importance. Hydroponics is a technique of growing plants in a nutrient solution in absence of soil.
Essential elements are elements which have a specific structural or physiological role and without which plants cannot complete their life cycle. There are 17 essential elements. Depending upon the quantity in which they are required by plants:
C, H, O are non-mineral elements. They are building blocks of macromolecules that form the plant body.
|Name of element||Absorbed as:||Functions:|
|Nitrogen||NO3–, NO2–, NH4+||Constituent of Proteins, Nucleic acids, Vitamins and Hormones, involved in metabolic activities.|
|Phosphorus||H2PO4–, HPO42-||Constituent of Cell membranes, Nucleic acids & Nucleotides, required for all phosphorylation.|
|Potassium||K||Maintains anion-cation balance, involved in protein synthesis, maintains turgidity in cell, helps in stomatal opening.|
|Calcium||Ca2+||Required for permeability of cell membrane, formation of mitotic spindle, formation of middle lamella.|
|Magnesium||Mg2+||Constituent of chlorophyll, maintains structure of ribosomes, activates enzymes of photosynthesis & respiration, involved in DNA & RNA synthesis.|
|Sulphur||SO42-||Constituents of amino acids – Methionine & Cysteine, Coenzymes, ferredoxin & Vitamins – Biotin, Thiamine & Coenzyme A.|