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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.

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References in periodicals archive ?
Sandrai GA, Tavakkoli E, Harris F, Koetz E, Angus J (in press) Improving nitrogen fertiliser use efficiency in wheat using mid-row banding.
Schwenke G, Haigh B (2016) The interaction of seasonal rainfall and nitrogen fertiliser rate on soil N20 emission, total N loss and crop yield of dryland sorghum and sunflower grown on sub-tropical Vertosols.
van Herwaarden AF, Farquhar GD, Angus JF, Richards RA, Howe GN (1998) 'Haying-off, the negative grain yield response of dryland wheat to nitrogen fertiliser I.
high nitrogen fertiliser prices are the bolt that secures the company's financial stability, its ambitious potash project is the key that should unleash its longaterm value, in our view.
We believe that every dollar increase in nitrogen fertiliser prices could fuel market confidence in Acron's ability to execute its potash project.
At first I was afraida[bar] Acron is primarily a nitrogen fertiliser producer: its financial profile is sensitive to gas prices, which accounted for 22% of operating costs in 2009.
This will likely pose a threat to the profitability of Acron and other nitrogen fertiliser producers.
Perhaps less obvious is the conclusion that the rate of nitrogen fertiliser that maximises expected profit is less than the rate that maximises expected yield.
If the riskiness of cropping varies at different rates of nitrogen fertiliser, then this would influence the rate preferred by these 'risk averse' farmers.
If this price is subject to risk, then increasing crop yield by applying nitrogen fertiliser will increase the farmer's overall risk, by increasing the variance of income from the crop.
The other main source of risk relevant to nitrogen fertiliser decisions is the riskiness of crop production.
According to Borealis' statement GPN holds a 25% share of the French nitrogen fertilisers and nitrogen oxide reducers market.