Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Organic practices slightly affect corn and soybean yields

07.04.2003


Scientists from the University of Minnesota demonstrated yields of corn and soybeans were only minimally reduced when organic production practices were utilized as compared with conventional production practices. After factoring in production costs, net returns between the two production strategies were equivalent.



More than 80% of corn and soybeans produced in the United States is grown in the Midwest, the vast majority with conventional production practices in a corn-soybean rotation requiring annual synthetic fertilizer and pesticide application. This corn-soybean rotation is practiced on over 100 million acres.

Organic production practices, in compliance with standards defined by the United States Department of Agriculture’s National Organic Program (NOP), offer an alternative production system to conventional practices. The study of the influence of rotation length on yield of corn and soybean when grown utilizing organic and conventional production practices is published in the March-April, 2003 issue of Agronomy Journal, a publication of the American Society of Agronomy.


The study was conducted at two Minnesota locations from 1989 to 1999. Scientists evaluated a two-year corn-soybean rotation and a four-year corn-soybean-oat/alfalfa-alfalfa rotation under conventional and organic management and production strategies.

The analysis of yield data began in 1993, after the first complete cycle of the four-year rotation had occurred. From 1993 through 1999, yield of corn grown in the conventional two-year rotation averaged 143 and 139 bushels per acre at the two locations, while corn grown in the organic four-year rotation averaged nine percent and seven percent less, respectively.

During the same time frame, soybeans grown in the conventional two-year rotation averaged 43.1 and 40.7 bushels per acre, while organically produced soybeans averaged 19 percent and 16 percent less, respectively. Weed control was a major factor for the reduced yields in the organic production system, says Paul Porter, a University of Minnesota agronomist and co-author of the article. The larger yield reductions from organically produced soybeans relative to corn were associated with increased weed pressure in the soybean crop because of its placement in the rotation sequence.

While there was a reduction in both corn and soybean yields in the four-year organic strategy compared with the two-year conventional strategy, the organic strategy had lower production costs than the conventional strategy. Consequently, net returns for the two strategies were equivalent, without taking organic price premiums into account.

Conventionally produced soybeans were more responsive than conventionally produced corn to the expanded rotation length, Porter says. Whereas conventionally grown soybeans in the four-year rotation yielded three to six percent more than soybeans grown in the two-year rotation, conventionally grown corn in the four-year rotation yielded the same to four percent less than corn grown in the two-year rotation. These results suggest conventional soybean yields would be increased when grown in a longer rotation than the commonly practiced two-year corn-soybean rotation.

Agronomy Journal, http://agron.scijournals.org is a peer-reviewed, international journal of agriculture and natural resource sciences published six times a year by the American Society of Agronomy (ASA). Agronomy Journal contains research papers on all aspects of crop and soil science including resident education, military land use and management, agroclimatology and agronomic modeling, extension education, environmental quality, international agronomy, agricultural research station management, and integrated agricultural systems.


The American Society of Agronomy (ASA) www.agronomy.org, the Crop Science Society of America (CSSA) www.crops.org and the Soil Science Society of America (SSSA) www.soils.org are educational organizations helping their 10,000+ members advance the disciplines and practices of agronomy, crop and soil sciences by supporting professional growth and science policy initiatives, and by providing quality, research-based publications and a variety of member services.

Paul Porter | EurekAlert!
Further information:
http://www.agronomy.org
http://www.soils.org
http://agron.scijournals.org

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: First quantum photonic circuit with electrically driven light source

Optical quantum computers can revolutionize computer technology. A team of researchers led by scientists from Münster University and KIT now succeeded in putting a quantum optical experimental set-up onto a chip. In doing so, they have met one of the requirements for making it possible to use photonic circuits for optical quantum computers.

Optical quantum computers are what people are pinning their hopes on for tomorrow’s computer technology – whether for tap-proof data encryption, ultrafast...

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...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

European Health Forum Gastein 2016 kicks off today

28.09.2016 | Event News

Laser use for neurosurgery and biofabrication - LaserForum 2016 focuses on medical technology

27.09.2016 | Event News

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

23.09.2016 | Event News

 
Latest News

European Health Forum Gastein 2016 kicks off today

28.09.2016 | Event News

New switch decides between genome repair and death of cells

27.09.2016 | Life Sciences

Nanotechnology for energy materials: Electrodes like leaf veins

27.09.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>