1) Chemical 2) Fertilizer 3) Plant food 1) Compost 2) Fertilizer 
Substance that adds inorganic or organic plant nutrients to soil and improves its ability to grow crops, trees, or other vegetation.
A material that provides plants with one or more or the main plant nutrients that help them grow
A substance added to the soil to increase its productivity.
Generally accepted as 'artificial' nutrients supplied to the soil to replace soil reserves taken off in crops. The major nutrients are Nitrogen, Phosphorus and Potassium.
Organic or inorganic plant foods which may be either liquid or granular added to soil or compost to improve the quality of plant growth.