Navigation Links
Organic soils continue to acidify despite reduction in acidic deposition
Date:1/12/2009

Madison, WI, January 12, 2009 Following the Clean Air Act Amendments of 1970 and 1990 acidic deposition in North America has declined significantly since its peak in 1973. Consequently, research has shifted from studying the effects of acidic deposition to the recovery of these aquatic and terrestrial ecosystems. Regional-scale studies have focused primarily on aquatic systems and while many of these ecosystems are showing signs of chemical recovery (increases in acid neutralizing capacity and pH, decreases in sulfate and aluminum concentrations), recovery is slower than expected based on the magnitude of the decline in acid deposition. Researchers have long suspected that acidification of soils in these watersheds has slowed the recovery of aquatic ecosystems. Unfortunately, very few studies have examined change in soil chemistry. As a result our understanding of how soils have responded to decreases in acidic deposition at the regional scale is limited.

Researchers at Syracuse University sampled soils in 139 watersheds in the northeastern United States in 2001 that had previously been studied as part of the Direct/Delayed Response Project in 1984. The study showed that over the 17-yr interval, median base saturation in the Oa-horizon decreased from 56% in 1984 to 33% in 2001, while effective cation-exchange capacity, normalized to the soil carbon concentration, showed no significant change. The change in base saturation was the result of almost equivalent changes in carbon-normalized exchangeable calcium (CaN) and exchangeable aluminum (AlN). The median CaN declined by more than 50%, from 23.5 to 10.6 cmolc/kgC, while median AlN more than doubled, from 8.8 to 21.3 cmolc/kgC. This research, to be published in the January-February issue of the Soil Science Society of America Journal, was made possible by the financial support of the William M. Keck Foundation.

A somewhat surprising result was that the Central New England/Maine subregi
'/>"/>

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

Page: 1 2

Related biology news :

1. Organic plant waste proves effective weed control for citrus trees
2. Global warming is changing organic matter in soil
3. JHU chemists devise self-assembling organic wires
4. UNH receives $380,000 grant to study organic dairy as closed ecosystem
5. Organic corn: Increasing rotation complexity increases yields
6. New organic molecule in space
7. Are organic crops as productive as conventional?
8. Dissolved organic matter in the water column may influence coral health
9. Uncharged organic molecule can bind negatively charged ions
10. Is it organic or not?
11. Study reveals that nitrogen fertilizers deplete soil organic carbon
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/10/2015)... and TELTOW, Germany , August ... (SMI), a world leader in Eye Tracking Technology ... of its OEM Eye Tracking Platform for integration into ... Platform contains reference designs for seamless integration of eye ... virtual reality HMDs and augmented reality smart glasses. Omnivision,s ...
(Date:8/5/2015)... August 5, 2015 According to ... Management Market by Software, Services, Vertical (BFSI, Airport, IT & ... - Global Forecast to 2020", published by MarketsandMarkets, defines ... globally into various segments. The global PIAM Market is ... $546.2 Million by 2019, at a CAGR of 14.9 ...
(Date:8/3/2015)... , Aug. 3, 2015 Synaptics, Inc. ... interface solutions, today announced that members of the executive ... the Pacific Crest Global Technology Leadership Forum on Tuesday, ... conference will be held at the Sonnenalp Resort in ... The presentation may include forward-looking information. An audio webcast ...
Breaking Biology News(10 mins):SMI Completes OEM Eye Tracking Platform to Cover All Consumer Displays 2SMI Completes OEM Eye Tracking Platform to Cover All Consumer Displays 3Physical Identity and Access Management Market Worth $546.2 Million by 2019 2Physical Identity and Access Management Market Worth $546.2 Million by 2019 3Physical Identity and Access Management Market Worth $546.2 Million by 2019 4
... past several decades have led to heritable, genetic changes ... according to University of Oregon evolutionary geneticists. , Writing ... of SCIENCE, William E. Bradshaw, professor of biology, and ... populations have changed genetically in response to rapid climate ...
... years, scientists have identified a new genus of a living ... Science May 11 in the online Science Express. , ... of discovery' is by no means over," says William Stanley, ... The Field Museum, where the world's only specimen of this ...
... Kavli Institute of Nanoscience have discovered how to use ... on a chip. Based on this, they built a ... molecules individually. To demonstrate this, the Delft researchers sorted ... of the University of Florida has called the Delft ...
Cached Biology News:Recent, rapid climate change is driving evolution of animal species 2Scientists describe new African monkey genus ?first in 83 years 2Scientists describe new African monkey genus ?first in 83 years 3Biological motors sort molecules one by one on a chip 2
(Date:8/31/2015)... ... August 31, 2015 , ... There’s a new treatment option for excessive menstrual ... available new FDA approved system in the last 14 years, and the only endometrial ... (zero bleeding) rate of 66%, the high Patient Satisfaction rate of 98%, and the ...
(Date:8/28/2015)... ... August 28, 2015 , ... ... studies at the International Spine Intervention Society’ s 23rd Annual Scientific ... August 1st, 2015. With a focus on evidence-based research and clinical application, the ...
(Date:8/27/2015)... ... August 27, 2015 , ... The ... funds, investment firms and animal health companies to hear from animal health companies ... Several have also received licensing agreements or distribution contracts. This meeting is ...
(Date:8/27/2015)... PARK, Calif. , Aug. 27, 2015  Asterias ... in the emerging field of regenerative medicine, today announced ... investor conferences in the month of September.  ... will present at Rodman & Renshaw,s 17th Annual Global ... ET/7:25am PT at the St. Regis Hotel in ...
Breaking Biology Technology:U.S. FDA Approves Minerva Endometrial Ablation System 2U.S. FDA Approves Minerva Endometrial Ablation System 3Proove Biosciences Presents New Research Study at the International Spine Intervention Society’s Annual Scientific Meeting 2Proove Biosciences Presents New Research Study at the International Spine Intervention Society’s Annual Scientific Meeting 3Proove Biosciences Presents New Research Study at the International Spine Intervention Society’s Annual Scientific Meeting 4VetStem Biopharma, Inc. Among Seventeen Companies Selected to Present at the KC Animal Health Investment Forum on September 1st 2015 2VetStem Biopharma, Inc. Among Seventeen Companies Selected to Present at the KC Animal Health Investment Forum on September 1st 2015 3Asterias Biotherapeutics to Present at Upcoming Investor Conferences 2
... ROUGE, La., Sept. 10 Drug discovery and development ... enrollment and dosing of patients in a Phase 1 ... EP-100, the lead candidate from Esperance,s Cationic Lytic Peptide ... designed to seek and destroy cancer cells that over-express ...
... TAI,AN, Shandong, China, Sept. ... Bulletin Board: CBPO) ("China Biologic," or the,"Company"), ... in the,People,s Republic of China ("PRC"), operating ... Products Co. Ltd.,("Taibang") and Chongqing Dalin Biologic ...
... CORK, Ireland, September 10 Hovione announced today that,Terry Lambe, Ph.D., ... , Hovione acquired earlier this year an ... of the Hovione strategy to become a,leading manufacturer to the pharmaceutical ... Terry Lambe to Hovione. We want to build our,Cork site into ...
Cached Biology Technology:Esperance Pharmaceuticals Announces Initiation of Clinical Studies of its Novel Membrane-disrupting Agent, EP-100, in Patients with Cancer 2Esperance Pharmaceuticals Announces Initiation of Clinical Studies of its Novel Membrane-disrupting Agent, EP-100, in Patients with Cancer 3China Biologic Products to Attend at Susquehanna's Third Annual Beijing Management Summit 2China Biologic Products to Attend at Susquehanna's Third Annual Beijing Management Summit 3Hovione Appoints Terry Lambe to its Board of Directors 2