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Ritidian

From Soil Testing

Ritidian Series

 

Soil Classification: Clayey-skeletal, gibbsitic, nonacid, isohypothermic Lithic Ustorthents.

Description:
The Ritidian series consists of well-drained, moderately rapidly permeable soils that are very shallow to limestone (5 to 25 cm). These soils are on plateaus and escarpments. They formed in slope alluvium, loess, and residuum derived from sediment overlying coralline limestone. Soil texture of top horizon is clay loam or clay. Content of clay is 35 to 60 percent. The Ritidian soil covers approximately 11.9 percent of Guam's total land area.

Suitability: This soil series is not suited for farming, grazing or homesite development. It can be used for wildlife habitat, watershed and recreational development. The main limitations are steepness of slope and outcrops of jagged, uneven limestone rock.

Depth
(cm)

Clay
(%)
Moist
bulk
density
(g/cm3)
pH Organic
matter
(%)
CEC
meq/100g
Extractable
P mg/kg
Extractable
K mg/kg
0-25 35-60
0.70-0.90
7.2 7.5 -- -- --

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