A dense, immature ponderosa pine stand was thinned in 1962, 1972, and 1982 to six growing stock levels (30, 60, 80, 100, 120, and 150). Except for height, average tree growth characteristics (diameter, crown length, and width) were negatively correlated with residual stand density. Stand basal area and volume increment were positively related to stand density.
Recommendations are provided to aid the forest manager in regenerating Engelmann spruce by planting in the central and southern Rocky Mountains.Reforestation operations covered include storage, transportation, microsite selection, site preparation, planting, plantation protection, and recordkeeping. The physiological and silvicultural requirements of spruces are discussed with respect to the harsh environment of the spruce-fir zone so that planting principles can be better understood.
To provide a foundation for future research into the biodiversity, structure, and dynamics of southwestern forest communities, stand tables consolidating over 2,000 field plots, stratified by 11 different climax forest tree series, have been compiled. The data upon which the tables are based are made available in a computerized format, accessible by microcomputer. A suite of computer programs is also provided for manipulating the data base to meet individual research needs.Headquarters is in Fort Collins, in cooperation with Colorado State University.
Forest vegetation classified by habitat types and community types in Arizona and New Mexico are tabulated. Eleven series and 123 habitat and community types are identified; however, these habitat types and community types have been grouped into a lesser number of categories having similar characteristics or synonymous names. The table includes the name, location, relative site, successional status, tree and principal undergrowth associates, and the authority.
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