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Vegetational Approach to Soil Surveys in Wild-land Areas

ABSTRACT

This paper describes methods employed in the concurrent mapping of vegetation and soil on more than 3 million acres of mountainous land in California. The land is classified according to vegetational types, age and density of timber stands, timber site quality, and series and depth of soil. Important features are (1) office delineation on aerial photographs of most boundaries of vegetational and soil units in advance of field work, and (2) the large amount of basic information on native vegetation that is gathered and related to soil. Examples of vegetation-soil relationships that aid soil mapping are pointed out. Charts illustrate some of the kinds of vegetation-soil information that is obtained in the mapping and which can be put to use in managing the soil for timber and range purposes.

¹ California Forest and Range Experiment Station, Berkeley, Calif., and Department of Soils, University of California, Berkeley, Calif., respectively. Presented before Division V-A, Soil Science Society of America, Cincinnati, Ohio. November 21, 1952. Submitted for publication December 6, 1952.