e360 digest


14 Mar 2011: African Corn Faces Threat
From Even Moderate Warming, Study Shows

A review of crop trial data from thousands of sites across Africa shows that a temperature increase of 1 degree C (1.8 F) could cause declines in corn harvests in two-thirds of the continent’s maize-growing regions. Drawing on previously unstudied data from 20,000 trials of corn yields across Africa from 1999 to 2007, an international team of researchers found that the longer corn crops are exposed to temperatures above 30 degrees C (86 F), the more yields decline. And under drought conditions, the researchers found that more than 75 percent of corn-growing regions suffered yield declines of at least 20 percent as temperatures rose 1 degree C. Researchers from the International Maize and Wheat Improvement Center, reporting in the journal Nature Climate Change, said the results surprised them because maize was assumed to be among the more heat-tolerant crops. The researchers reached their conclusions after gathering data from the 20,000 trial sites and then comparing it with temperature and rainfall data. They said the results show that corn, a staple crop for many Africans, could suffer significant yield declines if, as predicted, higher temperatures and drought impact Africa in the future.

Email      Recommend     Tweet     Stumble Upon     Digg     Share    


Yale
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
.

SEARCH e360



Donate to Yale Environment 360
Yale Environment 360 Newsletter

CONNECT

Twitter: YaleE360
e360 on Facebook
Donate to e360
View mobile site
Bookmark
Share e360
Subscribe to our newsletter
Subscribe to our feed:
rss


ABOUT

About e360
Contact
Submission Guidelines
Reprints

E360 en Español

Universia partnership
Yale Environment 360 articles are now available in Spanish and Portuguese on Universia, the online educational network.
Visit the site.


DEPARTMENTS

Opinion
Reports
Analysis
Interviews
Forums
e360 Digest
Podcasts
Video Reports

TOPICS

Biodiversity
Business & Innovation
Climate
Energy
Forests
Oceans
Policy & Politics
Pollution & Health
Science & Technology
Sustainability
Urbanization
Water

REGIONS

Antarctica and the Arctic
Africa
Asia
Australia
Central & South America
Europe
Middle East
North America

e360 PHOTO GALLERY

“Peter
Photographer Peter Essick documents the swift changes wrought by global warming in Antarctica, Greenland, and other far-flung places.
View the gallery.

e360 MOBILE

Mobile
The latest
from Yale
Environment 360
is now available for mobile devices at e360.yale.edu/mobile.

e360 VIDEO

Warriors of Qiugang
The Warriors of Qiugang, a Yale Environment 360 video that chronicles the story of a Chinese village’s fight against a polluting chemical plant, was nominated for a 2011 Academy Award for Best Documentary (Short Subject). Watch the video.


header image
Top Image: aerial view of Iceland. © Google & TerraMetrics.

e360 VIDEO

Colorado River Video
In a Yale Environment 360 video, photographer Pete McBride documents how increasing water demands have transformed the Colorado River, the lifeblood of the arid Southwest. Watch the video.

OF INTEREST



Yale