211 Evaluation and Validation of P Indices

Poster Session
ASA Section: Environmental Quality The P-index concept is widely used to evaluate the risk of P loss from agricultural fields. Because there are nearly 50 permutations of P-indices in use, scientists and federal agencies have requested that all P indices be evaluated to determine if they are directionally and magnetically correct when compared with independently quantified P losses. The goal of this session is to highlight the results of P-index evaluations and encourage further quantitative evaluation and improved interpretation of P-indices. Poster presentations could include comparison of P-Indices with field and modeled data, P-index rankings relative to farm and watershed P imbalances, uniformity of P-index interpretation, and integration of P-indices in GIS frameworks.


Nutrient Loss Assessment and Prevention
Tuesday, October 18, 2011: 4:00 PM-6:00 PM
Henry Gonzalez Convention Center, Hall C

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Nathan Nelson
Poster #647
Characterization of Water Soluble Phosphorus From Selected Animal Manures In Arkansas.
Colin G. Massey, University of Arkansas; Nathan A. Slaton, University of Arkansas; Nancy A. Wolf, University of Arkansas; Cheri G. Villines, University of Arkansas; Betsy C. Murdoch, University of Arkansas; Russell E. DeLong, University of Arkansas
Poster #648
Assessment of the Phosphorus Index for Louisiana.
William Felicien, LSU AgCenter; Lewis Gaston, LSU AgCenter
Poster #649
Relationship Between Stream Microhabitat and Aquatic Insect Assemblages In Watersheds Associated with Managed and Unmanaged Areas In Bankhead National Forest.
Rufina Ward, Alabama A&M University; Heather Howell, Alabama A&M University; William Stone, Alabama A&M University