Now showing items 31-40 of 68
The effect of pH, aluminum, and chelator manipulations on the growth of acidic and circumneutral species of Asterionella
(Kluwer Academic Publishers; Springer Science+Business Media, 1991-12)
The growth rates of two diatoms, acidophilic Asterionella ralfsii and circumneutral A. formosa , were differentially affected by varying pH, Al, and EDTA in chemically defined media. Free Al ion concentration increased as ...
Changing Commuter Travel Behavior: Employer-Initiated Strategies
(Baywood Publishing Company, 1996)
Commuter travel has certain features that make it potentially more responsive to interventions than other types of travel. However, from the perspective of the employer attempting to implement a trip reduction program, it ...
Promoting ride sharing: The effect of information on knowledge structure and behavior. Executive Summary
(School of Natural Resources and Environment, University of Michigan, 1994)
The findings indicate that story-based information is more effective than factual text at conveying intangible aspects of carpooling and at creating a deeper understanding of issues related to carpooling. However, the ...
Promoting ride sharing: The effect of information on knowledge structure and behavior.
(School of Natural Resources and Environment, University of Michigan, 1994)
The study found that story-based information is more effective than factual text at conveying intangible aspects of carpooling and at creating a deeper understanding of issues related to carpooling. The study found that ...
Maximizing crop yield in alley crops
(Kluwer Academic Publishers; Springer Science+Business Media, 1998-06)
A simple graphical model is presented illustrating the balance between facilitation and competition necessary for maximizing crop yield in alley cropping systems. Three functions are composed into the decision function: ...
Carbon and nitrogen cycling during old-field succession: Constraints on plant and microbial biomass
(Kluwer Academic Publishers; Springer Science+Business Media, 1990-11)
Soil C and N dynamics were studied in a sequence of old fields of increasing age to determine how these biogeochemical cycles change during secondary succession. In addition, three different late-successional forests were ...
Pattern of Kirtland's warbler occurrence in relation to the landscape structure of its summer habitat in northern Lower Michigan
(Kluwer Academic Publishers; SPB Academic Publishing bv ; Springer Science+Business Media, 1992-03)
Studies of the endangered Kirtland's warbler in relation to landscape ecosystems were conducted from 1986–1988 on a large wildfire-burn surrounding Mack Lake in southeastern Oscoda County, Michigan. A landscape ecosystem ...
Nitrogen mineralization, nitrification and denitrification in upland and wetland ecosystems
(Springer-Verlag, 1991-10)
Nitrogen mineralization, nitrification, denitrification, and microbial biomass were evaluated in four representative ecosystems in east-central Minnesota. The study ecosystems included: old field, swamp forest, savanna, ...