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Australian Families of Flowering Plants[edit]






Major nutrients include: (from plant nutrition)
C = Carbon 450,000ppm
O = Oxygen 450,000ppm
H = Hydrogen 60,000ppm
N = Nitrogen 15,000ppm
K = Potassium 10,000ppm
Ca = Calcium 5,000ppm
P = Phosphorus 2,000ppm
Mg = Magnesium 2000ppm
S = Sulfur 1,000ppm
Fe = Iron 100ppm

Micro Nutrients:

Cl = Chlorine 100ppm
Mn = Manganese 50ppm
Zn = Zinc 20ppm
B = Boron 20ppm
Cu = Copper 6ppm
Mo = Molybdenum 0.1ppm

Nutrients and symptoms: Guam Uni Summary, Pretty summary

Primary macronutrients are nitrogen (N), phosphorus (P), and potassium (K) The secondary nutrients are calcium (Ca), magnesium (Mg), and sulfur (S).

  • Group 1 nutrients: N, S: covalently bound in reduced state within organic compounds.
  • Group 2 nutrients: P, B: covalently bound in fully oxidised state within organic compounds.
  • Group 3 nutrients: K, Ca, Mg, Na, Cl: present primarily in ionic form as either free ions in solution or as entities reversibly adsorbed by electrostatic forces on charged sites.
  • Group 4 nutrients: Mn, Fe, Co, Ni, Cu, Zn, Mo: tightly bound in proteins as metalloproteins. Co is only required in N-fixing plants as a coenzyme. All are transition series elements. All (except Zn) show variation in valency state with attendant variation in physiological effect. Function in Redox reactions.

Plant tissue analysis[edit]


  1. Distilled water
  2. Silver thriosulphate or Silver thriosulfate or STS
  3. Cycloheximide or CHI
  4. Ethephon is a plant growth regulator and used as a pesticide. Ethephon's mode of action acts via liberation of ethylene, which is absorbed by the plant and interferes in the growth process. It is also used in the acceleration of ripening of fruits and vegetables. [2] [3]