Around the world, extreme climatic conditions are forcing farmers to rethink current cropping system strategies. To maximize crop production in the face of variable temperatures and precipitation, scientists say farmers may want to adopt a system in which crop sequencing decisions are based upon weather patterns and management goals each year. However, before making the change to a more adaptable cropping systems strategy, researchers say it's important to understand how short-term crop sequencing decisions affect key agronomic and environmental attributes.
From 2002-2005, a team of researchers at the USDA-ARS Northern Great Plains Research Laboratory in Mandan, North Dakota investigated crop sequencing effects of 10 crops in a region known for its variable climate. The researchers report their findings as a series of six papers in the July-August 2007 issue of Agronomy Journal. The results from the study were originally presented at the 2005 ASA-CSSA-SSSA annual meeting.
Russian scientist suggests a hypothesis, allowing satisfying description for mechanisms of origin and evolution of Saturn rings and, possibly, other circular structures of the Solar system.
Saturn rings could have appeared after "switching on" of giant planet's magnetic field as a result of interaction between superconducting particles of the protoplanetary cloud and magnetic field.
MILAN, Italy - Scientists have exhumed the Renaissance-era remains of two intellectuals who belonged to Florence's powerful Medici family court, in an effort to learn more about their lives and deaths.
The 15th century remains of humanist philosopher Giovanni Pico della Mirandola and writer Angelo Ambrogini - better known as Poliziano - were exhumed Thursday from Florence's St. Mark's Basilica. The men, who were possibly lovers, each died in 1494, and the exact cause of their deaths is unknown.
A computer program that learns to decode language sounds in a similar way to a baby could shed new light on how humans acquire the ability to talk, say US researchers.
It casts doubt on the idea that babies are born with an innate understanding of all possible language sounds.
Large quantities of ozone-depleting chemicals have been discovered in the Antarctic atmosphere by researchers from the University of Leeds, the University of East Anglia, and the British Antarctic Survey.
The team of atmospheric chemists carried out an 18-month study of the make-up of the lowest part of the earth's atmosphere on the Brunt Ice Shelf, about 20 km from the Weddell Sea. They found high concentrations of halogens - bromine and iodine oxides - which persist throughout the period when there is sunlight in Antarctica (August through May). A big surprise to the science team was the large quantities of iodine oxide, since this chemical has not been detected in the Arctic.
Supermassive black holes have been discovered to grow more rapidly in young galaxy clusters, according to new results from NASA's Chandra X-ray Observatory. These "fast-track" supermassive black holes can have a big influence on the galaxies and clusters that they live in. Using Chandra, scientists surveyed a sample of clusters and counted the fraction of galaxies with rapidly growing supermassive black holes, known as active galactic nuclei (or AGN). The data show, for the first time, that younger, more distant galaxy clusters contained far more AGN than older, nearby ones.
For anyone stuck on a casino stool, playing hours of video poker, rest assured: humans can still beat a computer.
But computers may soon dominate on the felt-top table, as they have on the chessboard.
In a match of wits between man and machine this week, a software program running on an ordinary laptop computer fought a close match, but lost to two well-known professional human poker players.
The contest, which was billed as the "First Man-Machine Poker Championship" and which offered prize money totaling $50,000, pitted two professionals, Phil Laak and Ali Eslami, against a program written by a team of artificial intelligence researchers from the University of Alberta. They gave it a name that probably no gambler would ever choose as a nickname, Polaris.
A stunning new image of the Sun has been released by NASA which shows it as an almost perfect sphere, glowing a fiery red and orange in the pitch-black of space.
It is almost spotless, a sign that the Sun may have reached solar minimum. Scientists are now watching for the first spot of the new solar cycle to appear.
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| ©NASA
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| The sun, as photographed by NASA's SOHO spacecraft.
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Scientists thought that most new genes were formed from existing genes, but Cornell researchers have discovered a gene in some fruit flies that appears to be unrelated to other genes in any known genome.
A team of Greek paleontologists have discovered the tusks and fossilized remains of a 3-million-year-old mammoth-like mammal in Grevena, northern Greece.
