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:7/25/2014)... the Terra satellite show the different areas that have been ... The burn scars show up as reddish-brown splotches of ... across the remote parts of Eastern Russia in the Sakha ... instrument, it is still possible to see the smoke ... noted below show the devastating number of fires that have ...
(Date:7/25/2014)... biomedical engineering at the University of Houston, has ... artificial organ development., "Introduction to Tissue Engineering: Applications ... into the field of artificial organ development. Metin ... at UH, served as a series editor on ... other published books on the subject of growing ...
(Date:7/25/2014)... of diffusion tensor tractography (DTT), which is derived ... estimation for three motor tracts, such as the ... pathway became possible. The corticospinal tract is known ... function in the human brain. Several studies have ... transtentorial herniation. In addition, some studies have demonstrated ...
Breaking Biology News(10 mins):University of Houston researcher publishes textbook on tissue engineering 2
... Omnicell, Inc . (NASDAQ: OMCL ), a ... analytics software for healthcare facilities, today announced that ... supply and medication management solutions with the new fourth ... decade as an Omnicell pharmacy and supply automation customer, ...
... The cerebellum is far more intensively involved in helping ... effectively in spatial environments our brain, and particularly our ... cerebellum contributes to the creation of this map through ... ability is inactivated, the brain is no longer able ...
... available in Chinese on EurekAlert! Chinese . ... have published new research that improves the survival and effectiveness ... Chang Chan, from the Chinese University of Hong Kong, is ... has led to a variety of breakthroughs as stem cell ...
Cached Biology News:Athens Regional Medical Center Upgrades to Omnicell G4 Platform for Supply and Medication Management 2Athens Regional Medical Center Upgrades to Omnicell G4 Platform for Supply and Medication Management 3Athens Regional Medical Center Upgrades to Omnicell G4 Platform for Supply and Medication Management 4The cerebellum as navigation assistant 2Reprogramming stem cells to a more basic form results in more effective transplant, study shows 2
(Date:7/24/2014)... Gain recognition for leadership and contribution ... biotech industry. Nominations are now being accepted for ... by the Bio Supply Management Alliance , ... professionals for the past 7 years. , Awards ... industry – Manufacturers, Service Providers, Material Suppliers, Technology ...
(Date:7/24/2014)... leader Yung-Eun Sung has announced that they have ... graphenes which can be applied as high performance ... Sung is both a group leader at the ... Science* (IBS) and a professor at the Seoul ... with regards to the development of relative simplicity, ...
(Date:7/24/2014)... DUBLIN , July 24, 2014 ... the "Global Genomics and Proteomics Analytical Instruments Market ... http://photos.prnewswire.com/prnh/20130307/600769 Genomics is the ... is the study of the structure and functions of ... and bioinformatics tools and technology. Genomics involves the mapping ...
(Date:7/24/2014)... July 24, 2014 2014 Deep ... Industry” is a professional and in-depth research report ... Potassium Sulphate basic information, including its definition, ... overview. This research covers the international market analysis, ... industry analysis covering macroeconomic environment & economic situation ...
Breaking Biology Technology:Call for Submission: BSMA’s Supply Chain Management Innovation Awards 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 3Global Genomics and Proteomics Analytical Instruments Market 2014-2018: Key Vendors are Agilent, Bio-Rad , F. Hoffmann, La Roche, Illumina, PerkinElmer and Thermo Fisher Scientific 2Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 2Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 3Potassium Sulphate Market & SHMP Industry 2014 (Global, China) Analysis Now Available at DeepResearchReports.com 4
... ARBOR, Mich., Oct. 24 Gene Codes ... immediate,availability of the next version of Sequencher, ... analysis program. Researchers in academic labs ... which contains the essential genetic instructions key ...
... (OTC Bulletin Board: IMYN) CEO, Stephen Ferrone, will ... the Financial,Services Exchange (FSX) Investment Conference at the ... October 25, 2007. Immunosyn has obtained exclusive ... its largest shareholder, Argyll,Biotechnologies, LLC. Research suggests that ...
... Environment Where Scientists Thrive and Science is ... ... year, Abbott (NYSE: ABT ) has been named among the top ... Science is at the center of Abbott,s broad base of businesses. To,enhance ...
Cached Biology Technology:Gene Codes Corporation Announces Version 4.8 of Sequencher Software for DNA Sequence Assembly & Analysis 2Immunosyn Corporation to Present at FSX 2Abbott Named to Science Magazine's List of 'Top Employers' in the Biotech and Pharmaceutical Industry 2Abbott Named to Science Magazine's List of 'Top Employers' in the Biotech and Pharmaceutical Industry 3
... Reagent A - Fixation medium Reagent ... are intended for fixing cells in suspension ... cells with Reagent B. This procedure gives ... the morphological scatter characteristics of the cells ...
... Intended Use: Vision Mount is formulated for covering ... alcohol soluble OR alcohol insoluble end products. , ... ... with chromogens such as Fast-Red or AEC that require an ...
... Solution, High pH This pH 9.9 ... prior to immunohistochemical staining procedures. It is ... mounted on glass slides. For particular antigens, ... especially effective. It should be noted that ...
Collected from calves that are 10 days old or less. Sterile, cell culture tested, US Origin...
Biology Products: