IODP SEDIS - Thesaurus -

soils
NT	acid sulfate soils
	Alfisols
	Alluvial soils
	Andisols
	Andosols
	Aridisols
	Bog soils
	Brown forest soils
	Brown soils
	Calcareous soils
	Cambisols
	Chernozems
	Chestnut soils
	Clay soils
	Cryosols
	Desert soils
	Entisols
	Ferralites
	Ferralsols
	Ferruginous soils
	fragipans
	Gleys
	Gray forest soils
	Halomorphic soils
	Histosols
	humic soils
	Hydromorphic soils
	Inceptisols
	Intrazonal soils
	laterites
	Latosols
	Lithosols
	loam
	Luvisols
	Meadow soils
	Mediterranean soils
	Mollisols
	Mor
	Mull
	Oxisols
	Planosols
	Podzols
	Pseudogleys
	Red soils
	Regosols
	Rendzinas
	saline soils
	Sierozems
	Sod-podzolic soils
	Solonchak soils
	Solonetz soils
	Spodosols
	Terra rossa
	Tundra soils
	Ultisols
	Vertisols
	Zonal soils
RT	active layer
	aggregate
	agriculture
	agrochemicals
	alluvium
	bacteria
	bedrock
	biorhexistasy
	biota
	breakthrough curves
	bulk density
	calcification
	calcrete
	caliche
	capillarity
	capillary water
	catenas
	character
SN	Used for general pedology as well as for specific topics.

Soils (category)
SN	Soils, GeoRef category code 25, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).