Navigation Links
The Phosphorus Index: Changes afoot
Date:11/5/2012

Phosphorus (P) is both an essential nutrient in agricultural fields and a contributor to poor water quality in surface waters. To encourage improved P management in fields, the P Index was proposed as a risk assessment tool in 1992. After 20 years of use, modifications, and growing pains, does the P Index accurately assess the risk of P loss?

A special section being published next month in the Journal of Environmental Quality addresses that question. The collection of papers grew out of a symposium at the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America 2011 Annual Meetings. The section acknowledges the problems that have been encountered with P Index development and implementation, such as inconsistencies between state indices, and also suggests ways in which the indices can be tested against data or models to improve risk assessment and shape future indices.

The P Index was proposed in a 1992 symposium after people became aware of the environmental impacts of P loss from fields. Many farmers were applying manure or other biosolids to their fields at rates that over-applied P. Researchers realized that assessing the risk of P loss from those products was important to protect water quality. The P Index tool was needed to connect various conditions because P loss is influenced by both site characteristics (e.g., soil test levels, connectivity to water) and the sources of P applied (e.g., inorganic fertilizer, organic sources). It was therefore a great improvement over the use of agronomic soil testing for P risk assessment.

"The objective of the original P Index was to identify fields that had high risk of P loss and then guide producers' decisions on implementing best management practices," says Nathan Nelson, ASA and SSSA member and co-author of the special section's introductory paper. "The P Index has developed into a widely used tool to identify appropriate management pract
'/>"/>

Contact: Caroline Schneider
cschneider@sciencesocieties.org
608-268-3976
American Society of Agronomy
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. When the soil holds not enough phosphorus
2. Helping pigs to digest phosphorus
3. Holding a mirror to brain changes in autism
4. How old are these rocks, how were they made, and how long ago did these geologic changes happen?
5. Scientists find that neurological changes can happen due to social status
6. Changes in brains blood flow could cause brain freeze
7. Air pollution level changes in Beijing linked with biomarkers of cardiovascular disease
8. Nature: Molecule changes magnetism and conductance
9. New research finds increased growth responsible for color changes in coral reefs
10. New milestone book documents changes in the south Florida marine ecosystem
11. Height, weight and BMI changes seen in children treated with peginterferon alpha for hepatitis C
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/22/2014)...  NXT-ID, Inc. (NASDAQ: NXTD and ... focused on the growing mobile commerce market, announces it ... Apollo Robbins for the 2015 International CES debut ... Apollo Robbins will be at the NXT-ID ... some of his famous theft techniques to visiting media ...
(Date:12/19/2014)... Dec. 18, 2014  23andMe, Inc., the leading personal ... that pinpoints fine-scale differences in genetic ancestry of individuals ... Since immigrants first arrived more than four ... has served as a meeting place for peoples ... and the ongoing mixing of peoples with African, European, ...
(Date:12/17/2014)... RALEIGH, N.C. , Dec. 16, 2014 ... has licensed its PerformTek biometric technology to industry leaders ... their highly accurate, clinically validated, biometric wearable products. These ... January 6-9 in Las Vegas . ... the technology is accurate, flexible and robust – with ...
Breaking Biology News(10 mins):NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 423andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2
... post-weaning multi-systemic wasting syndrome (PMWS) on British Pig Industry published, ... PMWS, Farm-level intervention could save farmers up to 11,500 per ... pig virus, present on 99 per cent of pig farms has ... a whole, costing British farmers as much as 84 per pig ...
... could be improved by a discovery about how chickens regulate ... make-up can affect the signals sent from its stomach to ... enough to eat. Poultry farmers often have to restrict ... of fullness and can overeat, affecting their ability to reproduce. ...
... online publication version of Nature today presents two manuscripts ... and domestication of wheat. These achievements are the results ... and Developmental Biology (IGDB), Chinese Academy of Sciences, Chinese ... projects sequenced and analyzed two ancestral wheat genomes of ...
Cached Biology News:Pig wasting syndrome costing farmers millions 2Appetite genes are key to better diets for poultry, study shows 2The latest genomic studies of wheat sheds new light on crop adaptation and domestication 2The latest genomic studies of wheat sheds new light on crop adaptation and domestication 3
(Date:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... (WNS) is a poorly understood condition that, in the two ... northeastern states and killed as many as half a million ... measure that may help save the affected bats: providing localized ... no idea why it,s spreading so rapidly," says Justin Boyles, ...
... 5 Cardium Therapeutics (NYSE Alternext US: CXM) today announced ... form of debt with accompanying warrants to purchase shares of ... and sole placement agent for the transaction. The material ... in the Company,s Current Report on Form 8-K to be ...
... March 6 S*BIO Pte Ltd today announced ... Emerging BioScience Company of Singapore Award. Dr. Stephen ... the award on behalf of the company, from ... and Industry.The Annual BioSpectrum awards recognize outstanding contributions ...
Cached Biology Technology:Ecologists propose first prevention for white-nose syndrome death in bats 2Ecologists propose first prevention for white-nose syndrome death in bats 3Cardium Completes $3.5 Million Credit Facility 2Cardium Completes $3.5 Million Credit Facility 3Cardium Completes $3.5 Million Credit Facility 4S*BIO Receives BioSpectrum Editor's Choice, Emerging BioScience Company of Singapore Award 2S*BIO Receives BioSpectrum Editor's Choice, Emerging BioScience Company of Singapore Award 3