. Energy News .

Improving 'crop per drop' could boost food and water security
by Staff Writers
Minneapolis MN (SPX) Jun 02, 2013

File image.

Improvements in crop water productivity - the amount of food produced per unit of water consumed - have the potential to improve both food security and water sustainability in many parts of the world, according to a study published online in Environmental Research Letters May 29 by scientists with the University of Minnesota's Institute on the Environment (IonE) and the Institute of Crop Science and Resource Conservation (INRES) at the University of Bonn, Germany.

Led by IonE postdoctoral research scholar Kate A. Brauman, the research team analyzed crop production, water use and crop water productivity by climatic zone for 16 staple food crops: wheat, maize, rice, barley, rye, millet, sorghum, soybean, sunflower, potato, cassava, sugarcane, sugar beet, oil palm, rapeseed (canola) and groundnut (peanut).

Together these crops constitute 56 percent of global crop production by tonnage, 65 percent of crop water consumption, and 68 percent of all cropland by area. The study is the first of its kind to look at water productivity for this many crops at a global scale.

The wide range of variation in crop water productivity in places that have similar climates means that there are lots of opportunities for improving the trade-off between food and water.

And the implications of doing so are substantial: The researchers calculated that in drier regions, bringing up the very lowest performers to just the 20th percentile could increase annual production on rain-fed cropland enough to provide food for an estimated 110 million people without increasing water use or using additional cropland.

On irrigated cropland, water consumption could be reduced enough to meet the annual domestic water demands of nearly 1.4 billion people while maintaining current production.

"Since crop production consumes more freshwater than any other human activity on the planet, the study has significant implications for addressing the twin challenges of water stress and food insecurity," says Brauman.

For example, if low crop water productivity in precipitation-limited regions were raised to the 20th percentile of water productivity, specific to particular crops and climates, total rain-fed food production in Africa could be increased by more than 10 percent without exploiting additional cropland.

Similar improvements in crop water productivity on irrigated cropland could reduce total water consumption some 8-15 percent in precipitation-limited regions of Africa, Asia, Europe and South America.

Because the study is global in scope, it is able to identify potential locations for interventions, crops to pay attention to, and opportunities for the biggest improvements in crop water management. Specific solutions for improving crop per drop will vary by location and climatic zone over time, however.


Related Links
Minnesota Institute on the Environment
Farming Today - Suppliers and Technology

Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

Memory Foam Mattress Review

Newsletters :: SpaceDaily Express :: SpaceWar Express :: TerraDaily Express :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

Get Our Free Newsletters
Space - Defense - Environment - Energy - Solar - Nuclear


Researchers help threatened wheat crops in Asia
Corvallis OR (SPX) Jun 02, 2013
Researchers at Oregon State University have helped develop new environmental monitoring technology that will allow farmers thousands of miles away, in west and central Asia, to save millions of dollars while more effectively combatting a pest that is threatening their wheat crops. Twenty million acres of wheat in parts of Asia and North Africa are threatened by the "Sunn pest," a bug that ... read more

Elevated carbon dioxide making arid regions greener

New maps show how shipping noise spans the globe

Magnetospheric Multiscale Mission Team Assemble Flight Observatory

Landsat 8 Satellite Begins Watch

Northrop Grumman to Demonstrate Open Architecture Navigation System for DARPA

Orbcomm And Cartrack Deliver Telematics Solution For African Market

Narayansami Inaugurates ISRO Navigation Centre

Advanced aircraft detection to prevent 'friendly fire' mishaps

Indonesia on right path to saving forests: Greenpeace

UN mourns slain Costa Rica environmentalist

Forest, soil carbon important but does not offset fossil fuel emissions

Human activity echoes through Brazilian rainforest

Climate change raises stakes on US ethanol policy

Ultrasound 'making waves' for enhancing biofuel production

Enzyme from wood-eating gribble could help turn waste into biofuel

Molecular switch for cheaper biofuel

Solar plane on cross-country trek lands in St. Louis

EU defies Beijing, Berlin to impose levies on Chinese solar panels

EU faces tough decision on China solar panels

Recurrent Announces Commercial Operation of PV Projects in Ontario

Philippines ready to move forward on renewable energy?

Uruguay deficit likely to speed windpower plans

Romania decree threatens green energy projects

Cold climate wind energy showing huge potential

Germany's top court hears case against giant coal mine

Glencore Xstrata cancels coal export terminal plans

Proposed U.S. Northwest coal export project scrapped

China mine accident kills 22: state media

Hong Kong to mark Tiananmen anniversary with huge vigil

China blocks Tiananmen anniversary remembrance

Hong Kong marks Tiananmen as China blocks remembrance

World press alliance urges China to free journalists

The content herein, unless otherwise known to be public domain, are Copyright 1995-2012 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement