or NPK Fertilizers
fertilizers are often combined to produce multi-nutrient
most multi-nutrient fertilizers contain Nitrogen (N), Phosphorus (P)
and Potassium (K), the three nutrients needed in largest quantities
by plants, they are often called NPK fertilizers.
are different methods used in combining fertilizers. One common way
is bulk blending in which all materials are mixed together in a dry
state. There is no binding between raw material particles.
are also different methods of granulation where materials are
physically bound together. On close examination, it can be seen that
each granule is made up of different raw materials stuck together
and cannot be easily separated.
the Chemical Compound fertilizers, liquid and/or finely
ground raw materials are mixed together in a slurry and then dried.
Every granule is identical and contains all of the nutrients; the
individual raw materials are no longer visible.
fertilizers can also be produced as liquids.
forms of NPK fertilizers are equally useful, the nutrient content is
what really matters.
The different raw
materials can be seen in the Bulk Blend blend on the left, but not
in the "Chemical" compound on the right