Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Study offers new hope for increasing global food production, reducing environmental impact of agriculture

30.08.2012
Just-released Nature paper shows more strategic use of nutrients and water on a global scale could boost production 45 to 70 percent for most crops

Can we have enough to eat and a healthy environment, too? Yes—if we’re smart about it, suggests a study published in Nature this week by a team of researchers from the University of Minnesota and McGill University in Montreal.

Global demand for food is expected to double by 2050 due to population growth and increased standards of living. To meet this demand, it is often assumed we will need to expand the environmental burden of agriculture. The paper, based on analysis of agricultural data gathered from around the world, offers hope that with more strategic use of fertilizer and water, we could not only dramatically boost global crop yield, but also reduce the adverse environmental impact of agriculture.

“We have often seen these two goals as a trade-off: We could either have more food, or a cleaner environment, not both,” says lead author Nathaniel Mueller, a researcher with the University of Minnesota’s Institute on the Environment and a doctoral student in the College of Food, Agricultural and Natural Resource Sciences. “This study shows that doesn’t have to be the case.”

Mueller and colleagues used management and yield data for 17 major crops to take a big-picture look at how much water and nutrients it would take to bring underperforming farmlands to meet their food production potential. They also looked for places where fertilizer use could be cut down without substantially reducing crop yield. They found:
We could boost production 45 to 70 percent for most crops. The greatest opportunities for yield improvement are found in Eastern Europe, sub-Saharan Africa, East Asia, and South Asia.
Different inputs serve as limiting factors depending on the region and crop. Nutrients, for example, appear to be limiting corn production in Eastern Europe and West Africa and wheat production in Eastern Europe, while nutrients and water appear to limit rice production in Southeast Asia.
Worldwide, we could decrease nitrogen use 28 percent and phosphorus use 38 percent without adversely affecting yields for corn, wheat and rice. China stands out as a hot spot of nutrient overuse, but other areas, like the United States, Western Europe, and India, also have room to improve.

With strategic redistribution of nutrient inputs, we could bring underperforming lands worldwide to 75 percent of their production potential while only increasing global nitrogen use 9 percent and potassium use 34 percent—and reducing phosphorus use 2 percent.

The researchers caution that their analysis is at a coarse scale and that many other factors, including land characteristics, use of organic fertilizers, economics, geopolitics, water availability and climate change will influence actual gains in crop production and reductions in adverse environmental impacts. Nevertheless, they are encouraged by the strong indication that closing the “yield gap” on underperforming lands—previously identified as one of five promising points for meeting future food needs, along with halting farmland expansion in the tropics, using agricultural inputs more strategically, shifting diets and reducing food waste—holds great promise for sustainably boosting food security.

“These results show that substantial gains are indeed possible from closing the yield gap—and combining these efforts with improved management of existing lands can potentially reduce agriculture’s environmental impact,” Mueller says. “They also offer concrete suggestions as to where and how we can focus future efforts. This work should serve as a source of great encouragement and motivation for those working to feed the 9-billion-plus people anticipated to live on this planet in 2050 while protecting Earth’s indispensible life support systems.”

This paper is available via Advance Online Publication (AOP) at www.nature.com/nature. Journalists should seek to credit Nature as the source of stories covered. Additional maps and graphics available upon request.

Contacts:
Todd Reubold, Institute on the Environment,
reub0002@umn.edu, (612) 624-6140
Matt Hodson, University News Service,
mjhodson@umn.edu, (612) 625-0552

Todd Reubold | EurekAlert!
Further information:
http://www.umn.edu

More articles from Agricultural and Forestry Science:

nachricht Cascading use is also beneficial for wood
11.12.2017 | Technische Universität München

nachricht The future of crop engineering
08.12.2017 | Max-Planck-Institut für Biochemie

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: First-of-its-kind chemical oscillator offers new level of molecular control

DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.

Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

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

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Engineers program tiny robots to move, think like insects

15.12.2017 | Power and Electrical Engineering

One in 5 materials chemistry papers may be wrong, study suggests

15.12.2017 | Materials Sciences

New antbird species discovered in Peru by LSU ornithologists

15.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>