Natural Regeneration of Ponderosa Pine on Scarified Group Cuttings in Central Idaho
Abstract:Thirty-six group clearcuts (0.25 to 3.0 acres) were scarified just before the seedfall of a bumper cone crop in 1958. Germination and seedling survival were observed for 3 years on scarified and comparable unscarified sites representing a variety of aspects and slopes. Scarification increased germination and seedling survival. Three years after scarification, stocking on milacre quadrats averaged 40 percent on the 36 scarified areas but only 3 percent on unscarified areas. Aspect affected seedling survival on scarified sites. The ratio of disseminated seed to established seedlings ranged from 27:1 on aspects in the northeast are to 55:1 on aspects in the southwest are and 290:1 on ridges. scarification resulted in adequate stocking on aspects in the northeast are but results were inconsistent on aspects in the southwest are.
Document Type: Journal Article
Affiliations: Research foresters at the Intermountain Forest and Range Expt. Sta., Forest Service, U.S. Dept. Agric., field unit at Boise, Idaho
Publication date: July 1, 1965
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