This folder contains maps of soil organic carbon content (%; note the associated paper reports SOC in g/kg), bulk density (kg/m3) and soil organic carbon stock (kg/m2).

These maps were produced with regression-kriging.

The SOC stock map was produced with the calculate-then-model method in which first the SOC stocks at the sampling sites were computed from SOC concentration and bulk density and then interpolated.
Coarse fragment data were not available.

Projection:
UTM Zone 36S
"+proj=utm +zone=36 +south +ellps=WGS84 +datum=WGS84 +units=m +no_defs"


Citation:
https://doi.org/10.1016/j.geoderma.2018.09.011

On file names:

Properties
SOC_ : soil organic carbon concentration (%)
BD_  : bulk density (kg/m3)
OCS_ : soil organic carbon stock (kg/m3)

Soil layers
_l1 :  0-10 cm
_l2 : 10-20 cm
_l3 : 20-30 cm
_l4 :  0-30 cm

Uncertainty
_90l : lower boundary of the 90% prediction interval
_90u : upper boundary of the 90% prediction interval

Bas Kempen
2 September 2019