Silver Crest Award = Essential Elements
- Created by: lucycanham18
- Created on: 07-06-18 18:24
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- Essential Elements
- MACRO - MOLECULES (Required in small amounts)
- Carbon (CO2)
- Major parts of plant tissue from atmosphere + water.
- Hydrogen (H2)
- Major parts of plant tissue from atmosphere + water.
- Oxygen (O2)
- Phosphorus (P)
- Part of every day cells (occurs in protoplasm). Greater concentration in seeds = greater production. Deficiency = purple colouration at seedling stage, later yellowing stunted growth + delayed maturity.
- Potassium (K)
- It is essential in all metabolic processes. Influences uptake of other elements + affects respiration and transportation.Encourages cell wall thickening, synthesis and translocation of carbs. Deficiency = yellowing of leaf tips/margins - result of leeching and cultivation.
- Magnesium (Mg)
- It is active in enzyme systems and forms part of chlorophyll. Deficiency = discolouration and premature defoliation. Animals affected.Cure= adding Mg fertiliser.
- Sulphur (S)
- Deficiency = stunting and yellowing (cured - gypsum)
- Nitrogen (N2)
- From atmosphere + dead tissues, forms part of every cell in chlorophyl + all proteins. Abundance = green, suculent growth. Deficiency = loss of colour, gradual yellowing, less proteins + stunted growth.
- Calcium (Ca)
- In form of calcium pectate it forms part of the cell wall structure . Necessary for growth of stem tips. Deficiency = malformation of growing parts; symptoms are seldom in the field.
- Carbon (CO2)
- MICRO - MOLECULES (Required in smaller amounts)
- Molybdenum (Mo)
- Necessary for reduction of nitrate in plant otherwise it will accumulate and interfere with protein synthesis. Deficiency = formation of narrow leaves
- Boron (B)
- Has a role in Ca utilisation and development of actively growing parts of the plant.
- Zinc (Zn)
- Deficiency = vary
- Chlorine (Cl)
- Regulates osmotic pressure. Deficiency = wilting and bronzing.
- Copper (Cu)
- Form parts of the enzyme systems + necessary for formation of growth promoting substances
- Zinc (Zn)
- Deficiency = vary
- Zinc (Zn)
- Cu deficiency common on peak leading to growth abnormalities e.g. rapid wilting + weak stalks. Cured using copper oxychloride solution - soil sprayed with copper sulphate solution.
- Form parts of the enzyme systems + necessary for formation of growth promoting substances
- Cobalt (Co)
- Necessary for formation of nodules and N2 fixation
- Manganese (Mn)
- Play a role in enzyme systems, necessary in synthesis. Deficiency = (only in juvenile leaves) yellowing. High pH + good drainage may cause deficiencies and is cured by using MnSO4
- Iron (Fe)
- Play a role in enzyme systems, necessary in synthesis. Deficiency = (only in juvenile leaves) yellowing. High pH + good drainage may cause deficiencies and is cured by using MnSO4
- Iron (Fe)
- Molybdenum (Mo)
- MACRO - MOLECULES (Required in small amounts)
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