Filters: Tags: herbicides (X)484 results (11ms)
The use of biomass crops as an energy source is frequently mentioned as an option to reduce CO 2 emissions. To evaluate the possibilities reliable yield estimates of biomass crops are required. In this paper a simple method is developed to estimate regional yields of various biomass crops, based on the linear relation between intercepted light and biomass production. The quality of the estimates was studied by using the method to estimate yields of several agricultural crops in two regions in The Netherlands. In general a deviation of less than 10 % was found between actual and estimated average yield.
An unsaturated-zone transport model was used to examine the transport and fate of metolachlor applied to an agricultural site in Maryland, USA. The study site was instrumented to collect data on soil-water content, soil-water potential, ground water levels, major ions, pesticides, and nutrients from the unsaturated zone during 2002-2004. The data set was enhanced with site-specific information describing weather, soils, and agricultural practices. The Root Zone Water Quality Model was used to simulate physical, chemical, and biological processes occurring in the unsaturated zone. Model calibration to bromide tracer concentrations indicated flow occurred through the soil matrix. Simulated recharge rates were within...
SAINT JOE NOXIOUS WEED CONTROL PROJECT, SAINT JOE RANGER DISTRICT, IDAHO PANHANDLE NATIONAL FORESTS; BENEWAH, LATAH, AND SHOSHONE COUNTIES, IDAHO.
AIRPORT FOREST HEALTH PROJECT, PACIFIC RANGER DISTRICT, ELDORADO NATIONAL FOREST, ELDORADO AND PLACER COUNTIES, CALIFORNIA.
Twenty years of ecosystem reorganization following experimental deforestation and regrowth suppression.
Water-quality assessment of the Kentucky River basin, Kentucky: Results of investigations of surface-water quality, 1987-90
Occurrence and flux of selected pesticides in surface water of the upper Snake River Basin, Idaho and western Wyoming
Response of amphibians to clearcutting, burning, and glyphosate application in the Oregon coast range
Short-term effects of Bolero on the gill apparatus of a small number of mosquitofish (Gambusia affinis)