ultisols

The soils are generally nutrient-poor oxisols and ultisols and have high aluminum and iron content.

Solimões-Japurá moist forest 2008

The soils are mainly ultisols and alfisols in the south with entisols in the north.

East Sudanian savanna 2009

Soils are primarily ultisols and inceptisols, generally older, infertile soils.

Borneo lowland rain forests 2008

The soils are either highly weathered lateritic clays (oxisols or ultisols) or very young inceptisols.

Marianas tropical dry forests 2008

The majority of the soils in the central part and eastern patches are ultisols, the western arms of the ecoregion consist of entisols and oxisols in the Serras.

Mato Grosso tropical dry forests 2008

The major soil types are those developed from limestone residuum and are either alfisols or ultisols.

Mammoth Cave National Park, United States 2008

Dominant soils in the area belong mainly to the orders ultisols and oxisols, but with a great diversity of types according mainly to their topographic position.

Llanos 2007

Western CAR is underlain by relatively new and unweathered entisols, and central Cameroon, by a mixture of oxisols and ultisols, highly weathered soils that often contain a fragipan.

Northern Congolian forest-savanna mosaic 2007

Soils are generally acidic and predominantly entisols and ultisols; nutrient levels are generally low with exception of certain soils localized in the valleys around Valencia Lake.

Cordillera La Costa montane forests 2007

Oxisols and alfisols are most common in the south and central regions of the ecoregion, while a higher percentage of ultisols are found to the north.

Eastern Miombo woodlands 2007