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Outplanting Ponderosa Pine in Pots

Artificial forest regeneration in central Idaho is difficult because of adverse growing conditions. The soil is most commonly of granitic origin, coarse, and highly desiccative. The topography is rough, varying in steepness, aspect, and altitude over short distances. Average annual precipitation in the ponderosa pine type is about 23.0 inches; about 4.0 inches occurs from May 1 through September 30. Summer air temperatures of 950 F. are frequent, and relative humidities are often as low as 10 percent. Until recently, the survival of planted trees in this area seldom exceeded 30 percent. This low survival is unsatisfactory and indicates the need for new planting techniques.


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Author(s): James D. Curtis, Marvin W. Foiles

Publication: Tree Planters' Notes - Issue 66 (1964)