Hawaii Soil Types

Hawaii Soil Types
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The warm tropical climate of the Hawaiian Islands, combined with the volcanic activity and resulting outpouring of new lava, have made the types of soils found there as varied as the islands themselves.

A Young Landscape

Less than 10 percent of the total land area of the Hawaiian Islands is covered by mature soil. Most of the state has little or no soil cover.

Soil Materials

Hawaiian soils are created from a mixture of basaltic lava, volcanic ash, limestone from ancient corals and material deposits from water runoff.

Creating Salty Soil

The never-ending action of waves pounding the shoreline creates salt spray. When this evaporates, tiny bits of salt are carried to the land by the trade winds. If the land is in a rain shadow and remains dry, the excess salt in the soil can severely restrict plant growth.

Creating Prairie Soil

On the Big Island of Hawaii and Maui, a reddish prairie soil suitable for grazing has been formed by volcanic ash on higher-altitude areas of the islands where the rainfall is less than 35 inches per year.

Developed Soils

On the windward slopes of Oahu, Kauai, Maui and Hawaii, more developed reddish brown or yellow brown soils can be found; when fertilized, they provide a good base for crops. These areas have been used for pineapple and sugarcane production and tend to be high in iron.


The excessive rainfall on some parts of the islands, as well as high winds on exposed slopes and in the uplands, creates an excessive erosion problem in Hawaii. The effects of this erosion have been reduced by local farmers and ranchers adapting their husbandry methods to the local environment.

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