HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (7) Citing Articles via Google Scholar Google Scholar Articles by Johnson, A. M. Articles by Hodges, S. C. Search for Related Content PubMed PubMed Citation Articles by Johnson, A. M. Articles by Hodges, S. C. Agricola Articles by Johnson, A. M. Articles by Hodges, S. C. Related Collections Water Quality Phosphorus Ecological Risk Assessment Nutrient Management

Predicted Impact and Evaluation of North Carolina's Phosphorus Indexing Tool

^a Soil Science Department, North Carolina State University, Campus Box 7619, Raleigh, NC 27695-7619
^b Crop and Soil Environmental Science Department, Virginia Polytechnic Institute and State University, 330 Smyth Hall, Blacksburg, VA 24061

View larger version (44K): [in a new window]   Fig. 1. Median North Carolina Mehlich-3 soil test P index values for all crops by county for the year 2003. Data are from soils submitted to the North Carolina Department of Agriculture and Consumer Services, Soil Testing Division. Data compiled by R. Austin and D. Osmond, North Carolina State University, Department of Soil Science. A soil test index value of >50 indicates a site on which crops are not expected to show a response to further P additions.

View larger version (39K): [in a new window]   Fig. 2. Mean Phosphorus Loss Assessment Tool (PLAT) risk rating for 1379 sample sites by county.

View larger version (39K): [in a new window]   Fig. 3. Confined animal feedlots registered with the North Carolina Department of Environment and Natural Resources as required by the North Carolina .0200 Rules for Waste Not Discharged to Surface Waters. Animal operations with fewer than threshold populations (<100 for cattle and <250 for swine) and poultry operations with dry litter waste systems (see Fig. 4) are not included. Data are for 1998, 1 yr after the moratorium on new swine facilities enacted by the state legislature, and were obtained from the North Carolina Center for Geographic Information and Analysis (http://cgia.cgia.state.nc.us/ncgdc/; verified 17 June 2005).

View larger version (31K): [in a new window]   Fig. 4. Poultry operations throughout the state of North Carolina. Data are for 2004 and are used with permission from the North Carolina Department of Agriculture and Consumer Services, Veterinary Division. Includes all poultry operations, regardless of waste type or management.