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Revision as of 10:44, 12 May 2002
Fertilizer are substances brought with the intent of promoting plant growth.
Fertilizer typically adds to the soil major elements nitrogen, potassium, or phosphorus, secondary elements calcium, sulfur, magnesium, sodium and sometimes trace elements. Fertilizer can either be created from nature material such as manure or compost or it can created artifically as through the Haber-Basch process which creates ammonia.