Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.


a fertilizing agent added to agricultural soils, in the form of an added chemical, or manure.


material added to soil to improve its fertility by adding to its chemical composition. Usually infers a chemical agent such as superphosphate but blood and bone and kelp humus are included also. Some of them, e.g. calcium cyanamide, ammonium sulfate, urea, can cause poisoning.

Patient discussion about fertilizer

Q. i just have my period last november 25 and ended on 28.when is my possible fertile and ovulation period please help me identify my fertile and ovulation period

A. If someone knew it, it'd solve the human race many problems with fertility. The problem is that ovulation (and thus, the period of possible fertility) happens 14 days BEFORE the onset of menses, so you know about it only retrospectively.

However there ways such as serial body temperature measuring, along with kits that measures the level of hormones in the urine in order to estimate the time of the coming ovulation, and help in timing intercourse.

You may read more about it here (www.mayoclinic.com/health/ovulation-signs/AN01521 ) but anyway, consulting a doctor (e.g. gynecologist) may be wise.

More discussions about fertilizer
References in periodicals archive ?
In addition, due to low precipitation levels in the country, the use of fertilizers becomes a prerequisite in order to enhance the agricultural output.
Chapter One: Macro-economy and Development of Fertilizer Industry
We could see that a lot of our existing fertilizer plants needed repairs.
Bat Guano is one of the oldest fertilizers known to humans.
A constant, diluted fertilizer is as beneficial to plants as a constant healthy diet is beneficial to people; it's a smart alternative to the instant growth produced by high-concentration fertilizers, which is not healthy for plants and creates additional work for gardeners.
They must learn that fertilizers are not all benign, and that nitrogen, phosphorus and potassium are not the only ingredients in a bag of fertilizer.
As of 2000, about 100 Tg of reactive nitrogen were released each year from nitrogen fertilizer spread on farmlands around the world, according to the BioScience review.
The Royster-Clark plant produces 50,000 to 70,000 tons of fertilizer products annually, at times purchasing 5,000 tons of agricultural gypsum yearly as an ingredient in those products.
In Pakistan, Fertilizer is produced since 1957, at present five types of fertilizer i.
To reach this goal, farmers could apply fertilizer more precisely in the spring and not use the chemicals after harvest in the autumn, says Otto C.
One such solution would be to limit, not ban outright, fertilizer sales.