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Availability of
Type of Fertilizers Example
nutrient

Urea CO(NH 2) 2, Ammonium
Nitrogenous fertilizers Nitrogen sulphate (NH4) 2SO 4, Sodium
nitrate NaNO 3

Single superphosphate, Dicalcium
Phosphatic fertilizers Phosphorous
phosphate

Potassium chloride KCl, Potassium
Potassic fertilizers Potassium
nitrate KNO 3

Two or more Nitrophosphate, Ammonium
Complex fertilizers nutrients (N, P 2O 5, phosphate
K 2O)

PrecautionswithFertilizers

 Fertilizersshouldbeapplied in propermeasures as an excess of fertilizersis

not good for the plants.
 Properprecautionsregarding the time of applyingfertilizersshouldbetaken.

 Excess use of fertilizers can lead to water pollution as the extra

fertilizersgetwashedawayduring irrigation.
 Excess use of fertilizers can destroy the fertility of the soil as well.

How are fertilizers different from manure?

Manure Fertilizers

Manure provides humus to the soil Fertilizers do not provide humus to
the soil

Manures are less rich in nutrients Fertilizers are highly rich in
nutrients

Long term usage of manure leads Long term usage of fertilizers can