Interesting comments on a soil P variability study by Roger et al. (2014).
The recently published paper ‘Spatial variability of soil phosphorus in the Fribourg canton, Switzerland’ by Roger et al. (Geoderma, 2014) was discussed at our first meeting.
To summarise, a spatial investigation of the different phosphorus forms (total, organic and available) across 250 sites (FRIBO network) was carried out. Their results suggested that within agricultural soils the highest mean values of available P were found in cropland (2.12-81.3mg kg-1), whilst mean total P values were found to be most abundant in permanent grasslands (1186 mg kg-1). It was also suggested that available P appeared more sensitive to extrinsic factors (land use) than total P. They also suggested that the study in China by Liu et al. (Geoderma, 2013) reinforced their hypothesis that environmental conditions (such as temperature and precipitation) have less of an impact than farming practices (e.g. fertilisation), which leads to this difference in P abundance among…
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