Seeds in the Forest Floor of the Ponderosa Pine Type
The Boise Basin Eperimental Forest was chosen as the study area. Virgin stands typical of the ponderosa pine type of Central Idaho were found within its boundaries. The area had been divided into compartments and some mapped for forest types, age classes and topography. The mapped areas were used as the sampling units and ranged in elevation from 4900 to 5600 feet.
Description of forest conditions and aspects
Three forest conditions which could be easily identified in the field were chosen as sampling areas: open-brush areas, sapling-pole stands, and mature-overmature timber.