The purposes of this study were as follows: (1) to
determine if the use of selected supplementary instructional
materials, in the form of either computer assisted
instruction or additional readings and worksheet
presentations, could influence test scores relating to
science achievement for fifth grade students, and (2) to
determine whether...
Juvenile Douglas-fir, ponderosa pine, and whiteleaf manzanita
growth in southwest Oregon varied with density of co-developing
manzanita and presence of herbaceous cover. Plant xylem pressure
potential and stomatal conductance of each species was responsive
to competition-induced depletion of soil water. Rates varied among
species. The best correlations with growth usually...