Table 1.

Soil compositions

Field	Description	UNITS	DSMW	SOTWIS	CHINA	ESDB
T_GRAVEL	Topsoil gravel content	%vol.	√	√	√	√
T_SAND	Topsoil sand fraction	% wt	√	√	√	√
T_SILT	Topsoil silt fraction	% wt	√	√	√	√
T_CLAY	Topsoil clay fraction	% wt	√	√	√	√
T_USDA_TEX_CLASS	Topsoil USDA texture classification	Name	√	√	√	√
T_REF_BULK_DENSITY	Topsoil reference bulk density	kg/dm3	√	√	√	√
T_OC	Topsoil organic carbon	% weight	√	√	√	√
T_PH_H2O	Topsoil pH (H2O)	− log(H +)	√	√	√	√
T_CEC_CLAY	Topsoil CEC (clay)	cmol/kg	√	√	√	√
T_CEC_SOIL	Topsoil CEC (soil)	cmol/kg	√	√	√	√
T_BS	Topsoil base saturation	%	√	√	√	√
T_TEB	Topsoil TEB	cmol/kg	√	√	√	√
T_CACO3	Topsoil calcium carbonate	% weight	√	√	√	√
T_CASO4	Topsoil gypsum	% weight	√	√	√	√
T_ESP	Topsoil sodicity (ESP)	%	√	√	√	√
T_ECE	Topsoil SALINITY (Elco)	dS/m	√	√	√	√