Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Research suggests a new method to protect groundwater quality

09.05.2003


Farmers can prioritize areas within fields to reduce nitrate contamination



Fine-tuning fertilizer and irrigation management requires farmers to carefully balance optimizing yield and protecting groundwater quality. Some states even require farmers to use crop production practices to minimize nitrate leaching to groundwater in environmentally sensitive areas.

One such practice is using a nitrification inhibitor when applying nitrogen fertilizer, which helps protect nitrogen from leaching below the root zone until the crop can use it. Farmers are often reluctant to use nitrification inhibitors since they add to the cost of production, and only increase yield or protect from nitrate loss with specific combinations of soil type and climate – such as a warm, wet spring and sandy soils.


Recent research in the central Platte river valley of Nebraska investigated a promising new option for producers growing irrigated corn in environmentally sensitive areas, according to Richard Ferguson, professor of agronomy, University of Nebraska.

The study, conducted from 1995-1998, explored ways to reduce nitrate leaching to groundwater. Results from the study are published in the May/June issue of the Soil Science Society of America Journal, published by the Soil Science Society of America. Co-authors are Murray Lark, Silsoe Research Institute, Great Britain; and Glen Slater, University of Nebraska.

Using information about soil properties obtained from grid soil sampling, along with maps of crop yield and soil electrical conductivity, these researchers developed management zones to direct the application of nitrification inhibitors.

In relatively dry-to-normal growing seasons, the use of a nitrification inhibitor had no effect on grain yield or nitrate leaching. However, in a growing season with a very wet spring, the use of a nitrification inhibitor increased yield. Patterns of higher and lower yield in the wet growing season corresponded closely to patterns of soil electrical conductivity.

According to Ferguson, producing soil electrical conductivity or yield maps is much easier and cheaper for producers than grid soil sampling.

"If we can develop an approach to allow farmers to prioritize areas within fields where nitrification inhibitors will be most beneficial, we believe that will encourage more farmers to use the practice. This approach could help protect groundwater quality while significantly reducing the cost and time required for the farmer," he says.

While it’s premature to say that maps of soil electrical conductivity or grain yield can be used to predict where nitrification inhibitors should be used, the researchers have seen enough similar results in other studies to warrant continued study.


Soil Science Society of America Journal (SSSAJ), http://www.scijournals.org is a peer-reviewed, international journal of soil science published six times a year by the Soil Science Society of America. SSSA Journal contains soil research relating to physics; chemistry; biology and biochemistry; fertility and plant nutrition; genesis, morphology, and classification; water management and conservation; forest and range soils; nutrient management and soil and plant analysis; mineralogy; and wetland soils.

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.




Sara Uttech | EurekAlert!
Further information:
http://www.scijournals.org
http://www.agronomy.org

More articles from Agricultural and Forestry Science:

nachricht Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University

nachricht New findings about the deformed wing virus, a major factor in honey bee colony mortality
11.11.2016 | Veterinärmedizinische Universität Wien

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: Electron highway inside crystal

Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.

Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Researchers identify potentially druggable mutant p53 proteins that promote cancer growth

09.12.2016 | Life Sciences

Scientists produce a new roadmap for guiding development & conservation in the Amazon

09.12.2016 | Ecology, The Environment and Conservation

Satellites, airport visibility readings shed light on troops' exposure to air pollution

09.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>