Offers a database and search function of a range of articles about fertilizers.

A range of lawn fertilizing articles beginning with "Choosing Fertilizers for Home Lawns".

Concise discussion about organic and inorganic fertilizing along with a number of lawn fertilization topics.

The North Carolina Department of Agriculture and Consumer Services offers advice on the fertilizer penalty system.

Detailed chemical factsheet about the properties of ammonium nitrate.

Factsheet offering information about ammonium sulfate.

Chemical information about the properties of urea.

Outlines general fertilizer practices, nitrogen and phosphorus requirements, and application timing for lawns.

Factsheet about the chemical properties of diammonium phosphate.

Discusses the uses of fertilizers.

A commercial soil-testing laboratory that provides soil and water testing as well as plant and tissue analysis for golf courses and athletic fields, as well as agronomic growers and dealers.

Articles discussing the uses of fertilizer on certain types of plant (in pdf format).

Explains the best way to fertilize these types of plants.

Online source for organic gardening products including fertilizers, biological pest control, soil test kits.

Information on fertilizers to supplement nutrients in the soil.

Explains the basics for fertilizing certain types of potplants.

Information on fertilizing shrubs and trees on home lanscapes.

Debates whether to fertilize with organic or inorganic products.

Information on products and their content of heavy metals, along with fertilizer laws and label requirements.

Explains the necessities of fertilizing plants.

Details the benefits of and how to fertilize lawns.