Ag Data Commons
21 files

USDA Legacy P project: P lability in soils and sediments

posted on 2024-06-10, 20:30 authored by ZACHARY SIMPSONZACHARY SIMPSON, Joshua Mott, Peter Kleinman

The USDA Legacy Phosphorus Project seeks to leverage watershed research with USDA NRCS (Natural Resource Conservation Service) and USDA ARS (Agricultural Research Service) to advance the science, innovation, and forecasting of legacy phosphorus (P) mitigation strategies. This project utilizes Conservation Effects Assessment Project (CEAP) watersheds across seven research sites within the Snake River, Mississippi River, Lake Erie, Chesapeake Bay, and Lake Champlain watersheds.

This dataset supports the manuscript entitled "Phosphorus lability across diverse agricultural contexts with legacy sources" Simpson et al., to be submitted to Journal of Environmental Quality. [Citation will be updated upon acceptance + publication.]

The main data file contains multiple sheets to guide the user, see 'readme' and 'column descriptions' for details. The 'Data Summary' sheet has the primary data in tidy format.

The R project (.Rproj) file is useful for navigating the R code in RStudio. Scripts to support and reproduce the analyses in the manuscript are given. Code for figures are also in these scripts. The 'analyses' folder includes EPC0 fits via


-- for sake of space, only the selected fits are included here ("best performing models by site") -- unzip that folder to use.

Contact Zach Simpson for more information.

Funded through an interagency agreement between USDA-NRCS and USDA-ARS, specifically: USDA Conservation Effects Assessment Project (CEAP) Watershed Assessment Studies




Data contact name

Simpson, Zachary, P

Data contact email


Ag Data Commons

Intended use

This dataset supports the mentioned manuscript and will provide a basis for follow-up studies in preparation, as part of the USDA Legacy P project.

Use limitations

Specifics are covered in the manuscript. Management and other watershed characteristics are sparsely mentioned here but require finer detail at the site level (to be developed in follow-up studies).

Temporal Extent Start Date


Temporal Extent End Date



  • irregular


  • Not specified

Geographic Coverage

{ "type": "FeatureCollection", "features": [ { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -114.36470497551085, 42.529335182614005 ], "type": "Point" } }, { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -93.09390598792665, 44.946633559442546 ], "type": "Point" } }, { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -86.91101529627943, 40.4475015791034 ], "type": "Point" } }, { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -82.98470786777187, 39.94533443107363 ], "type": "Point" } }, { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -89.51980787402127, 34.36179062102241 ], "type": "Point" } }, { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -90.91031835603383, 33.423806690274304 ], "type": "Point" } }, { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -76.91429174520925, 39.028501684729235 ], "type": "Point" } }, { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -77.86482753622907, 40.79920562190611 ], "type": "Point" } }, { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -73.15613564726097, 44.466151759214654 ], "type": "Point" } }, { "type": "Feature", "properties": {}, "geometry": { "coordinates": [ -105.06758701599048, 40.57270549634876 ], "type": "Point" } } ] }

Geographic location - description

Generic study locations (within CEAP) are generally grouped at 7 locations, by watershed: Snake River Basin, coordinated by team at Kimberly, ID Le Sueur River Watershed, coordinated by team at St. Paul, MN Beasley Lake watershed, coordinated by team at Oxford, MS West Lake Erie Basin, coordinated by teams at West Lafayette, IN and Columbus, OH Mahantango Creek watershed, coordinated by team at University Park, PA Choptank River (Coastal Plain) watershed, coordinated by team at Beltsville, MD Lake Champlain Basin, coordinated by team at Burlington, VT

ISO Topic Category

  • environment
  • farming

National Agricultural Library Thesaurus terms

soil; sediments; phosphorus; watersheds; natural resources conservation; Agricultural Research Service; Conservation Effects Assessment Project; Snake River; Mississippi River; Lake Erie; Chesapeake Bay; lakes; data collection; environmental quality; computer software; models

OMB Bureau Code

  • 005:53 - Natural Resources Conservation Service
  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research
  • 005:027 - Conservation Operations

ARS National Program Number

  • 211
  • 212

Pending citation

  • Yes

Related material without URL

Simpson et al., Phosphorus lability across diverse agricultural contexts with legacy sources. Submitted to Journal of Environmental Quality

Public Access Level

  • Public