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6. Humic
Rhodic Eutrustox
Rwanda
This is an example of a humus-rich Oxisol. At
elevations >~1000m in the humid tropics,
Oxisols like this one contain large quantities of
soil organic matter. This soil contains more than
16 kg of organic carbon per square meter to a
depth of 1m. Because this and similar soils are
better-suited for low-input agriculture than
those at lower elevations, they support some of
the highest human population densities in the
world. Maize, bananas, and peanuts are growing in
this farming system.
(each white and black scale division represents 10 cm)
(Reference: Fred H. Beinroth et al., 1996.
Properties, classification, and management of
Oxisols. Guy D. Smith Memorial Slide Collection.
USDA-NRCS) |
