Study area: We cover 1.04 billion ha of global cropland with a resolution of 0.5°×0.5° based on the land-use harmonization data.
The main loss of phosphorus from agricultural soils is due to soil erosion. Thus we combine the most recent spatially distributed global soil erosion estimates with global P content of cropland soils to assess global soil P loss maps. Global soil phosphorus contents were taken from Ringeval et al. 2017. Phosphorus loss from soils was induced by erosion/ soil loss. The data on soil erosion were taken from Borrelli et al. 2017.
As a result, the world’s soils are currently being depleted in Phosphorus in spite of high chemical fertilizer input. The P depletion rates are different from continent to continent.
This section is currently under update andmore information will be provided soon.
Data will be available soon on "Global average P losses due to soil erosion in kg P ha-1 yr-1".
References - Input data:
Ringeval, B. et al. 2017. Phosphorus in agricultural soils: drivers of its distribution at the global scale. Global Change Biology, doi:10.1111/gcb.13618 .
Borrelli, P. et al. 2017. An assessment of the global impact of 21st century land use change on soil erosion. Nature Communications 8, 2013, doi:10.1038/s41467-017-02142-7.