The popular methods of knowledge representation used
in knowledge-based systems mostly are attribute-value pair,
object-attribute-value triplets, semantic networks, frames and
logic. The knowledge of the fertilizer is collectives and
declaratives, but may vary from one to another. It also
describes the specification of the fertilizer but different context
is embedded in a single knowledge which indirectly
complicates the knowledge representation. To generalize the
knowledge representation, combination of rule-based and
semantic network are used.