Category: General Publications
Title: Herbaceous Vegetation a Factor in Natural Regeneration of Ponderosa Pine in the Southwest
Author: Pearson, G.A.
Subject: Ponderosa pine (Pinus ponderosa), Seeding, Regeneration, Vegetation studies
Abstract: Subordinate vegetation, commonly called ground cover, plays an important role in the life of forests. Not only does it exert a direct influence upon soil and trees but its character may be an indicator of soil and moisture conditions. There are two broad types of ground cover-herbs and shrubs. Herbs, particularly the grasses, tend to prevail on the heavier soils and shrubs on the lighter, more porous soils. Grasses have a relatively shallow and compact root system adapted to intensive feeding in superficial soil layers. Shrubs as well as trees prefer the more open soils which permit deep root development and deep moisture penetration. Shallow-rooted herbs are dependent on summer showers, whereas the deeper rooted shrubs and trees are able to grow with little or no summer precipitation if the soil is well saturated during the winter months.
Source: Ecological Monographs
Publisher: Ecological Society of America, http://www.esa.org/