fertilizers

n. organic or chemical substances added to soil to enrich it (i.e. manure)

n. person or thing which fertilizes; organic or chemical substance added to soil to enrich it (i.e. manure), fertiliser

Fertilizers (also spelled fertilisers) are compounds given to plants to promote growth; they are usually applied either via the soil, for uptake by plant roots, or by foliar feeding, for uptake through leaves. Fertilizers can be organic (composed of organic matter), or inorganic (made of simple, inorganic chemicals or minerals). They can be naturally occurring compounds such as peat or mineral deposits, or manufactured through natural processes (such as composting) or chemical processes (such as the Haber process).
See more at Wikipedia.org...

Noun
1. any substance such as manure or a mixture of nitrates used to make soil more fertile
(synonym) fertiliser, plant food
(hypernym) chemical
(hyponym) organic, organic fertilizer, organic fertiliser
(substance-meronym) sodium nitrate, soda niter
(derivation) fertilize, fecundate, fertilise