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 Six-legged livestock -- sustainable food production
11.05.2017 | Faculty of Science - University of Copenhagen

nachricht Elephant Herpes: Super-Shedders Endanger Young Animals
04.05.2017 | Universität Zürich

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: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

Physicists discover mechanism behind granular capillary effect

24.05.2017 | Physics and Astronomy

Measured for the first time: Direction of light waves changed by quantum effect

24.05.2017 | Physics and Astronomy

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>