|
CERE
Faculty
Analytical Laboratory
Plant Sciences Building
Research Sites
Barton
O'Neal
Fairview
Portneuf River
| |
|
Barton Road
Research Results - Soil Moisture
There were
consistent differences in soil moisture among the treatments (control
plots, nitrogen addition plots, shrub removal plots). Shrub removal
plots had more soil moisture than control plots, which in turn had more
soil moisture than nitrogen addition plots. Tests of average soil
moisture from 30 – 190 cm showed significant treatment effects every
year on at least some sample dates. Repeated measures ANOVA of column
averages showed a significant treatment effects in all years. There were
no significant treatment*time interaction.
The following
graph shows average soil moisture from 30 - 190 cm depths over 8 years
on control plots, nitrogen addition plots, and shrub removal plots. The
dark blue dotted line shows average cumulative precipitation at this
site; the lighter blue dotted line shows actual cumulative precipitation
in each calendar year. |
Inouye, R.S. 2006. Effects of shrub removal and nitrogen addition on soil
moisture in sagebrush steppe. Journal of Arid Environments 65:604-618.
|
Center
for Ecological
Research
and Education