News tagged with fertilizers
Men can rest easy -- sex chromosomes are here to stay
Fears that sex-linked chromosomes, such as the male Y chromosome, are doomed to extinction have been refuted in a new genetic study which examines the sex chromosomes of chickens.
May 08, 2012 |
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Model predicts 'religiosity gene' will dominate society
(PhysOrg.com) -- In the past 20 years, the Amish population in the US has doubled, increasing from 123,000 in 1991 to 249,000 in 2010. The huge growth stems almost entirely from the religious culture’s ...
Jan 28, 2011 |
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For highly educated women, families are an increasingly popular option
An increasing number of highly educated women are opting for families, according to a national study co-authored by a University at Buffalo economist.
Other Sciences / Social Sciences
May 15, 2012 |
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Plant diversity is key to maintaining productive vegetation
Vegetation, such as a patch of prairie or a forest stand, is more productive in the long run when more plant species are present, a new University of Minnesota study shows. The unprecedented long-term study of plant biodiversity ...
May 03, 2012 |
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Insect glands may illuminate human fertilization process
Insect glands are responsible for producing a host of secretions that allow bees to sting and ants to lay down trails to and from their nests. New research from Carnegie scientists focuses on secretions from glands in the ...
May 03, 2012 |
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Sexual reproduction works thanks to ever-evolving host, parasite relationships: study
(PhysOrg.com) -- It seems we may have parasites to thank for the existence of sex as we know it. Indiana University biologists have found that, although sexual reproduction between two individuals is costly ...
Jul 07, 2011 |
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Meat eating led to earlier weaning, helped humans spread across globe
When early humans became carnivores, their higher-quality diet allowed mothers to wean babies earlier and have more children, with potentially profound effects on population dynamics and the course of human evolution, according ...
Apr 18, 2012 |
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Fertilizer use responsible for increase in nitrous oxide in atmosphere
University of California, Berkeley, chemists have found a smoking gun proving that increased fertilizer use over the past 50 years is responsible for a dramatic rise in atmospheric nitrous oxide, which is a major greenhouse ...
Space & Earth / Earth Sciences
Apr 02, 2012 |
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Natural levels of nitrogen in tropical forests may increase vulnerability to pollution
(PhysOrg.com) -- Waterways in remote, pristine tropical forests located in the Caribbean and Central America contain levels of nitrogen comparable to amounts found in streams and rivers flowing through polluted forests in ...
Mar 06, 2012 |
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Analysis raises atmospheric, ecologic and economic doubts about forest bioenergy
A large, global move to produce more energy from forest biomass may be possible and already is beginning in some places, but scientists say in a new analysis that such large-scale bioenergy production from ...
Apr 18, 2012 |
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Oocytes: Going with the flow
Most cells rely on structural tethers to position chromosomes in preparation for cell division. Not so oocytes. Instead, a powerful intracellular stream pushes chromosomes far-off the center in preparation ...
Aug 28, 2011 |
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New research on newly formed plants could lead to improved crop fertility
A new University of Florida study shows genomes of a recently formed plant species to be highly unstable, a phenomenon that may have far-reaching evolutionary consequences.
Jan 06, 2012 |
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Cyanobacterium demonstrates promise for biotechnology feedstock production
Harvard Medical School researchers have engineered a photosynthetic cyanobacterium to boost sugar production, as a first step towards potential commercial production of biofuels and other biotechnologically and industrially ...
Apr 17, 2012 |
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Paternal components in fruit flies, humans may contribute to fertilization, embryonic development
(PhysOrg.com) -- It had long been assumed that the human sperm cell’s mission in life ended once it had transferred its freight of parental DNA to the egg. More recently however, other components of sperm have been implicated ...
Feb 29, 2012 |
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Seed size is controlled by maternally produced small RNAs: research
Seed size is controlled by small RNA molecules inherited from a plant's mother, a discovery from scientists at The University of Texas at Austin that has implications for agriculture and understanding plant ...
Apr 11, 2012 |
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Fertilizer
Fertilizer (or fertiliser) is any organic or inorganic material of natural or synthetic origin (other than liming materials) that is added to a soil to supply one or more plant nutrients essential to the growth of plants. A recent assessment found that about 40 to 60% of crop yields are attributable to commercial fertilizer use.
Mined inorganic fertilizers have been used for many centuries, whereas chemically synthesized inorganic fertilizers were only widely developed during the industrial revolution. Increased understanding and use of fertilizers were important parts of the pre-industrial British Agricultural Revolution and the industrial Green Revolution of the 20th century.
Inorganic fertilizer use has also significantly supported global population growth — it has been estimated that almost half the people on the Earth are currently fed as a result of synthetic nitrogen fertilizer use.
Fertilizers typically provide, in varying proportions:
The macronutrients are consumed in larger quantities and are present in plant tissue in quantities from 0.15% to 6.0% on a dry matter (0% moisture) basis (DM). Micronutrients are consumed in smaller quantities and are present in plant tissue on the order of parts per million (ppm), ranging from 0.15 to 400 ppm DM, or less than 0.04% DM.
Only three other macronutrients are required by all plants: carbon, hydrogen, and oxygen. These nutrients are supplied by water and carbon dioxide.
The nitrogen-rich fertilizer ammonium nitrate is also used as an oxidizing agent in improvised explosive devices, sometimes called fertilizer bombs, leading to sale regulations[citation needed].
For more information about Fertilizer, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
