Description
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 article
Simpson,Z.P., Mott,J., Elkin,K., Buda,A., Faulkner,J., Hapeman,C., McCarty,G., Foroughi,M., Hively,W.D., King,K., Osterholz,W., Penn,C., Williams,M., Witthaus,L., Locke,M., Pawlowski,E., Dalzell,B., Feyereisen,G., Dolph,C., … Kleinman, P.J.A. (2024). Phosphorus lability across diverse agricultural contexts with legacy sources. Journal of Environmental Quality, 1–19. https://doi.org/10.1002/jeq2.20632
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
brms
-- 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
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| best performing models by site.7z | Unknown | Open resource | |
| USDA Legacy P project - soils and sediments dataset.xlsx | XLS | Open resource | |
| agri-v-ref_P-properties.png | PNG | Open resource | |
| EPC0_v_AEM_and_GAM_v3.png | PNG | Open resource | |
| pairs_core-P-vars_v3.png | PNG | Open resource | |
| pairs_Fe-Al-clay.png | PNG | Open resource | |
| pairs_stratification-ratios.png | PNG | Open resource | |
| sed-vs-soil_emmeans-contrasts.png | PNG | Open resource | |
| strat-ratio_via-emmeans.png | PNG | Open resource | |
| time-since-last-P_AEM-EPC0-BWI_soils-only.png | PNG | Open resource | |
| correlation matrices for various variables.R | R | Open resource | |
| data and plot setup.R | R | Open resource | |
| estimate EPC0 by site -- Snake River.R | R | Open resource | |
| GAMs for EPC0.R | R | Open resource | |
| labile P as a stock.R | R | Open resource | |
| organise model-based EPC0 estimates.R | R | Open resource | |
| soil vs sediment contrasts.R | R | Open resource | |
| stratification of P in soils.R | R | Open resource | |
| time since last P, other mgmt.R | R | Open resource | |
| USDA Legacy P - P lability in soils and sediments.Rproj | Unknown | Open resource | |
| readme.txt | Text | Open resource |