Question

Unlike manure, fertilizers are inorganic substances which do not
improve the structure of the soil. They only supply extra amounts
of nutrients to the growing plants when applied to the soil. The
commercial fertilizers commonly used today can be classified
into three major categories; namely, nitrogen (N), phosphate and
potash fertilizers.
Besides knowing the type of fertilizer to use, a farmer also
needs to know when to apply the fertilizer and how to apply it.
The fertilizer should be applied at the time when the plants need
a particular nutrient most. The time and method of application
will determine how profitably the fertilizers have been used in
farming Fertilizers which have not been properly applied cannot
be absorbed in large quantities by plant roots. These fertilizers
may be washed away by rain or they may kill the plants. This
would mean a definite financial loss for the farmer.​

Answer 1

Unlike manure, fertilizers are inorganic substances which do not

improve the structure of the soil. They only supply extra amounts

of nutrients to the growing plants when applied to the soil. The

commercial fertilizers commonly used today can be classified

into three major categories; namely, nitrogen (N), phosphate and

potash fertilizers.

Besides knowing the type of fertilizer to use, a farmer also

needs to know when to apply the fertilizer and how to apply it.

The fertilizer should be applied at the time when the plants need

a particular nutrient most. The time and method of application

will determine how profitably the fertilizers have been used in

farming Fertilizers which have not been properly applied cannot

be absorbed in large quantities by plant roots. These fertilizers

may be washed away by rain or they may kill the plants. This

would mean a definite financial loss for the farmer.