Fertilizer is any organic or inorganic material of natural or synthetic origin that is applied to soil or to plant tissues to supply essential nutrients. Fertilizers can be used to increase crop yields, improve plant quality, and maintain soil fertility. There are many different types of fertilizers available, and the best type for a particular crop will depend on the soil conditions, the climate, and the specific needs of the plant.
Fertilizers have been used for centuries to improve crop yields. The earliest known fertilizers were animal manure and compost. In the 19th century, scientists began to develop synthetic fertilizers, which are made from inorganic materials. Synthetic fertilizers are more concentrated than organic fertilizers, and they can be more easily applied to crops. However, synthetic fertilizers can also be more expensive and they can have negative environmental impacts.