The hydrophobicity of soils of the Deschutes National Forest was
studied. The soils are Cindery Typic Cryorthents, formed in cinders
and ash from Mt. Mazama. Ponderosa pine is the dominant overstory
vegetation. Of particular interest was the effect of prescribed
burning on hydrophobicity. Fire has been shown to cause a...
Ground-based skidding may
cause unacceptable damage to
woodland soils when owners
make no attempt to minimize the area
covered with skid trails. As much as
40 percent of the area may be covered
with skid trails during a single entry if
you do not plan and mark them in advance.
Groundwater contamination on irrigated land is of concern in this nation
and around the world. In order to reduce the potential of groundwater
contamination by agricultural practices such as irrigation, fertilizer and pesticide
application, vadose-zone monitoring and sampling are needed. The main
objective of this study was to evaluate impacts...
Volatile hydrophobic compounds (HOCs) brought into soil and sediment
systems represent a serious threat to the environment. Dissolved
organic carbon (DOC) may exert an important influence over the total
aqueous solubility and mobility of organic pollutants through their
incorporation into micelles or the formation of soluble complexes.
To date, however,...
Succinic acid, a low molecular weight dicarboxylic acid was used to leach out
heavy metals from Willamette Valley soil (contaminated separately with lead, copper,
and zinc) in form of water-soluble organo-metal complexes. The research tasks included
developing synthetic contaminated soils representative of those found at Superfund sites
and making heavy...
Protection of the quality and integrity of food supplies is of global concern. Crops can accumulate non-nutritive and sometimes toxic metals and metalloids. Accumulated metals/metalloids can come in part, from fertilizers, which may contain variable levels of non-nutritive metals or metalloids such as arsenic (As), cadmium (Cd), lead (Pb), nickel...