Navigation Links
Study reveals that nitrogen fertilizers deplete soil organic carbon
Date:10/29/2007

s since the 1970s. "The one- size-fits-all approach was intended to minimize the risk of nitrogen deficiency as insurance for high yields. Unfortunately, the usual result is over-fertilization because of the assumption that the fertilizer supplies more nitrogen than the soil. The opposite is true in most cases, and especially for the highly productive soils of the Corn Belt that receive the highest nitrogen rates." Added Khan, "The rates have been progressively inflated over the years by yield increases from agricultural advances such as better varieties and higher populations."

Their findings for the Morrow Plots are confirmed in published literature from field studies that included initial soil organic carbon data. "In numerous publications spanning more than 100 years and a wide variety of cropping and tillage practices," said Boast, "we found consistent evidence of an organic carbon decline for fertilized soils throughout the world and including much of the Corn Belt besides Illinois."

"We don't question the importance of nitrogen fertilizers for crop production," said Ellsworth. "But, excessive application rates cut profits and are bad for soils and the environment. The loss of soil carbon has many adverse consequences for productivity, one of which is to decrease water storage. There are also adverse implications for air and water quality, since carbon dioxide will be released into the air, while excessive nitrogen contributes to the nitrate pollution problem."

Because soils differ in their capacities to supply nitrogen, Khan and his colleagues stress the need for soil testing, ideally on a site-specific basis, as a prerequisite to soil-based nitrogen management that optimizes fertilizer rates.

In comparing USDA data for Iowa and Illinois, the two states that rank highest in corn production, they found that from 1994 to 2001, annual grain yields in Iowa averaged 1.7 billion bushels with 740 thousand tons of nitrogen, as comp
'/>"/>

Contact: Debra Levey Larson
dlarson@uiuc.edu
217-244-2880
University of Illinois at Urbana-Champaign
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Bioartificial kidney under study at MCG
2. Novel Asthma Study Shows Multiple Genetic Input Required; Single-gene Solution Shot Down
3. W.M. Keck Foundation funds study of friendly microbes
4. Yellowstone microbes fueled by hydrogen, according to U. of Colorado study
5. Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs
6. UCLA Study Shows One-Third of Drug Ads in Medical Journals Do Not Contain References Supporting Medical Claims
7. Study Demonstrates Gene Expression Microarrays are Comparable and Reproducible
8. Study Links Ebola Outbreaks To Animal Carcasses
9. Genome-wide mouse study yields link to human leukemia
10. Breakthrough Microarray-based Technology for the Study of Cancer
11. NYU Study Reveals How Brains Immune System Fights Viral Encephalitis
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/22/2014)... identity analyst firm Acuity Market Intelligence forecasts that in ... have a chip-based National eID card, including near-complete regional ... Asia , with its vast population, is expected ... of all National eID cards issued between 2014 and ... National eID Industry Report: 2014 Edition" — projects ...
(Date:10/18/2014)... patients referred for evaluation of suspected genetic conditions, ... 25 percent, including detection of a number of ... disease, according to a study appearing in ... coincide with the American Society of Human Genetics ... or coding regions of thousands of genes simultaneously ...
(Date:10/17/2014)... for the first time how bacteria can grow directly ... the opportunity to get tremendous insights into bacteria behavior ... discovered the bacterial growth in chronic lung infections among ... by the immune cells. The researchers discovered the immune ... bacteria, forcing the bacteria to switch to a much ...
Breaking Biology News(10 mins):Half the World's Population Will Have Chip-Based National Electronic Identity (eID) Cards by 2018 2Whole-exome sequencing shows potential as diagnostic tool 2Scientists opens black box on bacterial growth in cystic fibrosis lung infection 2
... Curabitur molestie mauris sed dolor dictum iaculis. Nulla ... in condimentum tincidunt, nisl lacus porta diam, sit amet suscipit ... consectetur adipiscing elit. Mauris est velit, iaculis scelerisque tempus semper, ... nec ut erat. Donec fringilla dapibus pharetra. Etiam vitae mi ...
... Oct. 16, 2012  Today 23andMe, the leading personal ... as Vice President Communications, Neil Rothstein as Vice ... Strategic Alliances joining the company,s executive leadership team. ... Castro is responsible for the company,s corporate communications, ...
... 17, 2012 Rising crime rates and terrorism ... monitoring and introduce reliable border control systems. These ... identification and automated immigration at all entry points, ... in the government vertical across Asia-Pacific. ...
Cached Biology News:23andMe Names Christine Castro, Neil Rothstein and Jonathan Ward to Leadership Positions 2Increased Focus on Security Bolsters Growth of Biometrics Market in Asia-Pacific, Finds Frost & Sullivan 2Increased Focus on Security Bolsters Growth of Biometrics Market in Asia-Pacific, Finds Frost & Sullivan 3Increased Focus on Security Bolsters Growth of Biometrics Market in Asia-Pacific, Finds Frost & Sullivan 4
(Date:10/25/2014)... According to new market research report "Data Center ... Telecom), by Design Types (Electrical, Mechanical), and by ... Tier 4) - Global Forecast to 2019", published ... Construction Market into various segments with an in-depth ... also identifies the factors driving this market, various ...
(Date:10/25/2014)... The Workgroup for Electronic ... authority on the use of health IT to ... appointment of four new co-chairs to the organization’s ... ,     Peter Dumont, Senior Director – ... Leader, Deloitte Consulting LLP ,     Deidre Rodriguez, ...
(Date:10/25/2014)... October 24, 2014 Today, Nerium International, ... the winners of its “Reflect Your Youth” contest, an ... only seen a difference in their skin since using ... new outlook on life as a result of their ... as an effort by Nerium International to inspire conversations ...
(Date:10/25/2014)... 2014 A new way to produce ... of current skin grafting technologies, it also speeds up ... method, outlined in the October issue of STEM CELLS ... skin injuries that result from severe burns and chronic ... skin’s regenerative elements. These wounds heal by contraction, with ...
Breaking Biology Technology:Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 2Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 3Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 4WEDI Appoints Four New Security and Privacy Workgroup Co-chairs 2Nerium International™ Inspires Conversation About the Journey of Aging with “Reflect Your Youth” Contest 2New engineering method shows promise for faster healing, more cosmetically appealing skin grafts 2New engineering method shows promise for faster healing, more cosmetically appealing skin grafts 3
... NEW HAVEN, Conn., Dec. 8, 2011  Cenestra Health announces ... has issued a new U.S. patent, No. 8,071,646 (the ... for highly pure formulations of eicosapentaenoic acid (EPA) and ... to about 5:1.  The ,646 patent provides exclusivity for ...
... team of scientists, led by Guillaume Gervais from McGill,s ... has engineered one of the world,s smallest electronic circuits. ... about 150 atoms or 15 nanometers (nm). This discovery, ... have a significant effect on the speed and power ...
... 2011  Fortis now offers a Bachelor of Science ... campuses – Fortis College, Cutler Bay and Fortis College, ... to students who already have a bachelor, associate or ... Fortis is now enrolling candidates who wish ...
Cached Biology Technology:Cenestra Health Announces Granting of Broad Patent Covering Proprietary Bioactive Lipid Formulations 2Cenestra Health Announces Granting of Broad Patent Covering Proprietary Bioactive Lipid Formulations 3Fortis Offers Bachelor of Science in Nursing Degree Program to Florida Students 2Fortis Offers Bachelor of Science in Nursing Degree Program to Florida Students 3
Anti-MD-2 (IN) Host: rabbit polyclonal Species Reactivity: human, mouse, rat Applications: WB, IHC Storage: 4C...
p-Bcl-2 (Thr 74)...
Neuropilin-2 Purified Anti-Rat clone 54, Isotype Mouse IgG 1 , 150 µg Consult technical datasheet for details....
CBF-B (G-2)...
Biology Products: