Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Climate affects recent crop yield gains

14.02.2003


Scientists at the Department of Global Ecology of the Carnegie Institution of Washington in Stanford, California, have found that climate trends significantly affect corn and soybean yields. David Lobell and Dr. Gregory Asner analyzed 17 years of data on crop yields, temperature, precipitation, and solar radiation throughout the U.S. for their study and published their results in the February 14, 2003, issue of Science.



The investigation showed that gradual increases in temperature cause significant decreases in productivity for the two major United States crops, corn and soybean. "We found that climate is a surprisingly important factor in crop yield trends," stated Lobell.

Most studies on climate changes and crop production have not looked at these kinds of data over this many years. Dr. Christopher Field, director of the Department of Global Ecology, noted: "What makes this study unique is that they looked at several regions that have experienced the same changes in technology, but different changes in climate. This allowed them to separate the contributions of climate and technology to yield trends, which has been hard to do in the past."


When the investigators factored in climate changes over the study period, they found that the gains in crop yield from improved management practices were about 20% lower than previously believed. "Most future projections of food supply are based on recent trends in crop yield growth, ignoring the effects of climate," remarked Lobell. "But our study shows that recent trends in climate have actually helped farmers’ yields, so in terms of management we may not be doing as well as we have thought."

Dr. Asner added: "Our results also suggest that global warming will affect food production. If the principal corn and soybean areas of the Midwest see rising temperatures, we will likely see negative impacts on crop yields there. According to our calculations, we can expect a 17% decline in yield of these crops for a one degree increase in growing-season temperature."

"The continuing growth of the human population already challenges the agricultural sector, and climate change may make efforts to increase yields even more difficult. It will take further research and collaboration between land managers, decision-makers, and scientists to meet these challenges," concluded Lobell.


###
The Department of Global Ecology is one of six departments of the Carnegie Institution of Washington. . See http://jasper.stanford.edu/globalecology/CIWDGE/CIWDGE.HTML for more information The other five departments are the Department of Terrestrial Magnetism and the Geophysical Laboratory in Washington, D.C., the Department of Embryology in Baltimore, Maryland, the Observatories in Pasadena, California, and the Department of Plant Biology in Stanford, California.

David Lobell, Greg Asner | EurekAlert!
Further information:
http://www.ciw.edu/

More articles from Agricultural and Forestry Science:

nachricht Farming with forests
23.09.2016 | University of Illinois College of Agricultural, Consumer and Environmental Sciences (ACES)

nachricht Ecological intensification of agriculture
09.09.2016 | Julius-Maximilians-Universität Würzburg

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: OLED microdisplays in data glasses for improved human-machine interaction

The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.

“Augmented-reality” and “wearables” have become terms we encounter almost daily. Both can make daily life a little simpler and provide valuable assistance for...

Im Focus: Artificial Intelligence Helps in the Discovery of New Materials

With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.

Elpasolite is a glassy, transparent, shiny and soft mineral with a cubic crystal structure. First discovered in El Paso County (Colorado, USA), it can also be...

Im Focus: Complex hardmetal tools out of the 3D printer

For the first time, Fraunhofer IKTS shows additively manufactured hardmetal tools at WorldPM 2016 in Hamburg. Mechanical, chemical as well as a high heat resistance and extreme hardness are required from tools that are used in mechanical and automotive engineering or in plastics and building materials industry. Researchers at the Fraunhofer Institute for Ceramic Technologies and Systems IKTS in Dresden managed the production of complex hardmetal tools via 3D printing in a quality that are in no way inferior to conventionally produced high-performance tools.

Fraunhofer IKTS counts decades of proven expertise in the development of hardmetals. To date, reliable cutting, drilling, pressing and stamping tools made of...

Im Focus: Launch of New Industry Working Group for Process Control in Laser Material Processing

At AKL’16, the International Laser Technology Congress held in May this year, interest in the topic of process control was greater than expected. Appropriately, the event was also used to launch the Industry Working Group for Process Control in Laser Material Processing. The group provides a forum for representatives from industry and research to initiate pre-competitive projects and discuss issues such as standards, potential cost savings and feasibility.

In the age of industry 4.0, laser technology is firmly established within manufacturing. A wide variety of laser techniques – from USP ablation and additive...

Im Focus: New laser joining technologies at ‘K 2016’ trade fair

Every three years, the plastics industry gathers at K, the international trade fair for plastics and rubber in Düsseldorf. The Fraunhofer Institute for Laser Technology ILT will also be attending again and presenting many innovative technologies, such as for joining plastics and metals using ultrashort pulse lasers. From October 19 to 26, you can find the Fraunhofer ILT at the joint Fraunhofer booth SC01 in Hall 7.

K is the world’s largest trade fair for the plastics and rubber industry. As in previous years, the organizers are expecting 3,000 exhibitors and more than...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Experts from industry and academia discuss the future mobile telecommunications standard 5G

23.09.2016 | Event News

ICPE in Graz for the seventh time

20.09.2016 | Event News

Using mathematical models to understand our brain

16.09.2016 | Event News

 
Latest News

Chains of nanogold – forged with atomic precision

23.09.2016 | Life Sciences

New leukemia treatment offers hope

23.09.2016 | Health and Medicine

Self-assembled nanostructures hit their target

23.09.2016 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>