Navigation Links
Illinois Soil Nitrogen Test measures microbial nitrogen
Date:5/11/2009

MADISON, WI, May 4, 2009--Contrary to the prevailing view, cereal crops derive the majority of their nitrogen from the soil, not fertilizer. Soils differ considerably in microbial activities that determine nitrogen-supplying power, and these differences must be taken into account if nitrogen fertilizers are to be used efficiently. The Illinois Soil Nitrogen Test (ISNT) was developed for this purpose, and involves estimation of gaseous ammonia liberated by heating the soil with strong alkali in a Mason jar. Several studies have provided evidence that the ISNT is predictive of yield response by corn to nitrogen fertilization, but there have also been negative evaluations in which concern has been raised that test values represent a constant proportion of total soil nitrogen rather than a microbial fraction that would be potentially available.

A study was conducted from 2004 to 2006 at the University of Illinois to clarify the chemical nature of what the ISNT measures and its relationship to microbial growth in agricultural soils. A multifaceted approach was taken, involving recovery tests with pure organic nitrogen compounds, statistical analyses of different nitrogen fractions measured for 26 Illinois agricultural soils, and incubation studies to determine incorporation of labeled nitrogen into soil nitrogen fractions. Results from the study were published in the May-June issue of the Soil Science Society of America Journal. The research was funded by the USDA and the Illinois Council on Food and Agricultural Research (C-FAR).

Recovery tests did not support the concept that the ISNT estimates total soil nitrogen. Rather, the results confirmed that the ISNT is selective for certain forms of microbial nitrogen, and differs from conventional acid-hydrolyzable fractions in the proportions of these compounds that are detected. Specifically, amides and the amino sugars in bacterial cell walls were detected, but not alpha-amino acids or fungal
'/>"/>

Contact: Sara Uttech
suttech@soils.org
608-268-4948
Soil Science Society of America
Source:Eurekalert

Page: 1 2

Related biology news :

1. Human aspects of climate change to be focus of conference at Illinois
2. NSF funds research at Illinois on sustainable biofuels infrastructure
3. NSF funds new Center for the Physics of Living Cells at Illinois
4. 2 University of Illinois researchers named HHMI investigators
5. Tree species composition influences nitrogen loss from forests
6. Researchers call for nitrogen and phosphorus reductions to combat eutrophication in aquatic systems
7. Cropland diversity reduces nitrogen pollution
8. Lichens function as indicators of nitrogen pollution in forests
9. Nitrogen applied
10. A little nitrogen can go a long way
11. EPA releases science assessment on health effects of nitrogen oxides
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... Institute of Standards and Technology (NIST) need a ... they often prove that necessity is truly the ... for M. Lorna De Leoz and Stephen Stein, ... glycomics. Glycomics is the study of the abundant, ... to proteins and lipids and influence cellular processes, ...
(Date:7/11/2014)... July 3, 2014, Shenzhen, China Researchers from Salk ... for the first time evaluated the safety and ... and successfully developed a new method, TALEN-HDAdV, which ... pluripotent stem cell (hiPSC). This study published online ... important theoretical foundation for stem cell-based gene therapy. ...
(Date:7/11/2014)... researchers, including scientists from the Max Planck Institute for ... major step in understanding photosynthesis, the process by which ... in its atmosphere and which is therefore crucial for ... The researchers report the first direct visualization of a ... in which a specific protein complex, photosystem II, splits ...
Breaking Biology News(10 mins):A new genome editing method brings the possibility of gene therapies closer to reality 2A first direct glimpse of photosynthesis in action 2
... LA JOLLA, CA---- Researchers at the Salk Institute for Biological ... skin cells and turned them into induced pluripotent stem cells ... form any other cell or tissue in the body. ... Shinya Yamanaka at Kyoto University in Japan, and human iPSCs ...
... Calif.) It happens in military units, street gangs ... cultures, the rituals mark the transition from adolescence to ... given. With a long history of seemingly universal ... puzzle. Why have so many cultures incorporated it into ...
... market to treat leukemia reversed symptoms of colitis in lab ... the University of Alberta. Faculty of Medicine & Dentistry ... journal, PLOS ONE . His team ... role in the development of colitis. When this gene quits ...
Cached Biology News:Induced pluripotent stem cells reveal differences between humans and great apes 2Induced pluripotent stem cells reveal differences between humans and great apes 3UCSB anthropologist examines the motivating factors behind hazing 2UAlberta medical researchers discover potential new treatment for colitis 2UAlberta medical researchers discover potential new treatment for colitis 3
(Date:7/11/2014)... 11, 2014  Researchers have pioneered a revolutionary ... new technology, called Virtual Finger, allows scientists to ... neurons and synapses using the flat surface of ... 3D imaging studies orders of magnitude more efficient, ... level across many areas of experimental biology. The ...
(Date:7/10/2014)... 10, 2014 Deep Knowledge Ventures ... Forum on ‘Commercialising Longevity Research’ and welcomed a ... the London Bioscience Innovation Center for the event, ... Aging Analytics Ltd. The meeting highlighted the need ... research for age-related disease, as well as the ...
(Date:7/10/2014)... Robert Harman, DVM, Founder and CEO of Vet-Stem, ... announce the relaunch of his highly informative blog, now named ... “ What are Stem Cells ?” Dr. Harman’s purpose ... in the basics of stem cell therapy so that pet ... of treatment when considering regenerative medicine. , A veterinarian by ...
(Date:7/10/2014)... , July 10, 2014  Franciscan ... use of capnography for respiratory monitoring outside ... of healthcare leaders in embracing state-of-the-art patient ... effectively patients are breathing and can alert ... By measuring the amount of carbon dioxide ...
Breaking Biology Technology:Virtual Finger Enables Scientists To Navigate And Analyze 3D Images Of Complex Biological Structures 2Virtual Finger Enables Scientists To Navigate And Analyze 3D Images Of Complex Biological Structures 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 2DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 3DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 4DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 5DKV Sponsors Forum on Commercialising Longevity Research; Brings Together Scientists, Investors, Entrepreneurs and Celebrities 6Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3Franciscan St. Anthony Health-Crown Point Underscores Patient Safety Commitment Through Expanded Use of Capnography 2
... 5 DURECT Corporation,(Nasdaq: DRRX ) announced today ... 31, 2007. Total revenues were $6.6 million for the,three ... for the same,period in 2006. Net loss for the ... to a net loss of $9.8 million for the ...
... ST. LOUIS, Feb. 5 Monsanto Company,s ... global commercial,business, and Carl Casale, executive vice ... in separate presentations at two,conferences later this ... an update on the company,s,business performance and ...
... BEIJING and CLAREMONT, Calif., Feb. 5 /Xinhua-PRNewswire-FirstCall/ ... Board: KWBT) reports,on a meeting between Kiwa ... and Dr.,Xiao-Dong Huang from the Department of ... the possibility of collaboration in research and,development ...
Cached Biology Technology:DURECT Corporation Announces Fourth Quarter and Year End 2007 Financial Results 2DURECT Corporation Announces Fourth Quarter and Year End 2007 Financial Results 3DURECT Corporation Announces Fourth Quarter and Year End 2007 Financial Results 4DURECT Corporation Announces Fourth Quarter and Year End 2007 Financial Results 5DURECT Corporation Announces Fourth Quarter and Year End 2007 Financial Results 6DURECT Corporation Announces Fourth Quarter and Year End 2007 Financial Results 7DURECT Corporation Announces Fourth Quarter and Year End 2007 Financial Results 8DURECT Corporation Announces Fourth Quarter and Year End 2007 Financial Results 9Kiwa Bio-Tech Products Group Discusses Cooperative Research With the University of Waterloo, Canada 2Kiwa Bio-Tech Products Group Discusses Cooperative Research With the University of Waterloo, Canada 3
... system uses a burst of high-pressure ... acid-coated gold or tungsten microparticles to ... or organelles without dependence or interaction ... includes helium pressure regulator, solenoid, spacer ...
... system, 220-240 V, is used for ... The system includes the BioLogic LP ... MV-6 injection valve, proportioning valve or ... and fittings kit, column and conductivity ...
Sf21 Insect Cells (Frozen) in Max-XP Medium...
... have been developed for affinity capture ... variety of ProteinChip chemical surfaces allow ... their unique biochemical properties. Each chip ... sample comparison, and the chips are ...
Biology Products: