A global compilation of soil phosphorus concentrations from peer-reviewed studies using the Hedley fractionation method. The database contains 178 total measurements of soil P fractions, compiled by Yang and Post (2011) and Cross and Schlesinger (1995). Data were published from 1985 through 2010.
Use Cases
- Model global soil phosphorus availability by analyzing trends in labile inorganic P and occluded P fractions across different soil orders.
- Correlate soil phosphorus fractions with environmental covariates like soil pH and organic carbon content to understand controlling factors.
- Map the geographic distribution of different phosphorus pools using the provided latitude and longitude coordinates.
- Analyze temporal trends in phosphorus fraction data from studies published between 1985 and 2010.
Strengths
- Compiles 178 measurements of soil phosphorus fractions from a standardized analytical method.
- Includes associated site data such as soil order, pH, organic carbon, nitrogen, and geographic coordinates.
Limitations
- Limited to 178 data points, which is a small sample size for global-scale analysis.
- Data is temporally stale, with the most recent measurements from studies published by 2010.
- Restricted to natural, unfertilized, and uncultivated soils, limiting applicability to agricultural systems.
Provenance
- Source
- Peer-reviewed literature citing the Hedley fractionation method.
- Collection Method
- Compiled from a literature survey restricted to studies of natural soils since 1995, combined with a prior compilation of pre-1995 data.
- Time Range
- Studies published from 1985 through 2010.
- Freshness
- Data compilation ended in 2010; no updates indicated.
- Geography
- Global, based on the geographic coordinates of measurement sites.