Critical limit of plant nutrient element and hunger signs
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The macronutrients are nitrogen (N), phosphorus (P), potassium (K), sulfur (S), calcium (Ca) and magnesium (Mg). Compared to the macronutrients, the concentrations of the seven micronutrients – iron (Fe), zinc (Zn), manganese (Mn), copper (Cu), born (B), chlorine (Cl) and molybdenum (Mo) – are very small.
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There are 12 essential elements that plants obtain from soil and also plant requires carbon, hydrogen and oxygen to live.
Hunger signs - Yellowing of leaves and drying of stem and branches......
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