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 Combination of Resistance Genes Offers Better Protection for Wheat against Powdery Mildew
22.01.2018 | Universität Zürich

nachricht New study shows producers where and how to grow cellulosic biofuel crops
17.01.2018 | University of Illinois College of Agricultural, Consumer and Environmental Sciences

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: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Thanks for the memory: NIST takes a deep look at memristors

22.01.2018 | Materials Sciences

Radioactivity from oil and gas wastewater persists in Pennsylvania stream sediments

22.01.2018 | Earth Sciences

Saarland University bioinformaticians compute gene sequences inherited from each parent

22.01.2018 | Life Sciences

VideoLinks Wissenschaft & Forschung
Overview of more VideoLinks >>>