plant nutrient available forms

plant nutrient available forms

Nutrient Available form
Carbon CO2
Hydrogen H2O
Oxygen H2O,

O2

Nitrogen NH4+ 

NO3-

Phosphorus H2PO4- 

HPO42-

potassium K+
calcium Ca2+
magnesium Mg2+
sulphur SO2-4 

SO2

iron Fe2+ 

Fe3+

zinc Zn2+
manganese Mn2+
boron H3BO3
copper Cu2+
molybdenum MoO42-
chlorine Cl-

In acidic soils phosphorus is available in

H2PO4-

form and at alkaline pH phosphorus is available as

PO43-

.

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