Word: croppings
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...mentally and physically,” sophomore Kate Mills said. “It was great to see us come out there, swim fast times, and swim like a team.”Mills led the way once again with two individual wins, while Harvard’s talented crop of freshmen and sophomores provided the depth to overcome the Bears.The Crimson started the meet with a bang, sweeping the top three places in the 200-yard medley relay.Mills won the day’s first individual event, the 1000-yard freestyle, in 10:05.93. Freshman Kristi Korsberg and junior...
...Ocean - has long captured the curiosity of scientists. A report released in the Jan. 23 issue of Science breathes fresh air into that ongoing study, confirming that the mass, nicknamed the 'Brown Cloud' but comprised of several small, local clouds, is soot from human burning of wood, dung and crop residue, as well as industrial processes and traffic pollution...
...likely to be a temporary beneficial effect on agriculture. Like people, plants generally prefer warmth to cold, and they may flourish with rising levels of CO2. But research from Wolfram Schlenker at Columbia University shows that, as average temperatures continue to warm, those benefits dwindle and eventually reverse, and crop yields begin to decline. "It simply becomes too hot for the growing plants," says Naylor. "The heat damages the crops' ability to produce enough yield...
With these frightening predictions in mind, we need to try to heat-proof our agriculture. That can be accomplished by using crops that have proved resistant to extreme heat - like sorghum or millet - to breed hybrid-crop varieties that are more capable of withstanding higher temperatures. We'll need to drop any squeamishness about consuming genetically modified crops. Unless we can tap the power of genetics, we'll never feed ourselves in a warmer world. But we'll need to act quickly. It can take years to breed more heat-resistant species, and investment in agricultural research has shriveled...
...also need to focus on improving the agricultural productivity of those parts of the world that have been left behind by the Green Revolution - like Africa, where average crop yields per acre remain well below those in Asia or the West. One simple way is to increase the amount of fertilizer available to African farmers. Sanginga notes that about 440 lb. (200 kg) of nitrogen fertilizer is generally needed to grow 5 tons (5,000 kg) of maize, but the average African farmer can afford only 8 lb. of fertilizer. We can also work on safeguarding the degraded soils...