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Filtering by: Committee Member Ocamb, Cynthia M. Degree Name Doctor of Philosophy (Ph.D.)

Decomposition of Brassicaceae Residue in the Willamette Valley

Creator:

Berry, Pete A.

Abstract:

An important inoculum source of Leptosphaeria maculans and L. biglobosa (syn Plenodomus spp.), the pathogens that cause black leg in Brassicaceae crops, is infected plant residues. The general acceptance of conservation tillage in the Willamette Valley, Oregon, USA, has enabled a build-up in the amount of residue on or near...

Resource Type:

Dissertation
Strategies for sampling and estimation of aboveground tree biomass

Creator:

Poudel, Krishna Prasad

Abstract:

The issue of global climate change and an increasing interest in the reduction of fossil fuel carbon dioxide emissions by using forest biomass for energy production has increased the importance of quantifying forest biomass in recent years. The official U.S. forest carbon reporting is based on the forest biomass estimates...

Resource Type:

Dissertation
Direct and indirect effects of livestock grazing intensity on processes regulating grassland bird populations

Creator:

Johnson, Tracey N.

Abstract:

In grasslands, grazing by large ungulates can influence vegetation structure, composition, primary productivity, and ultimately, ecosystem functioning. While grazing represents a complex disturbance, grazing intensity largely determines the effects of grazing on vegetation. Structural and compositional changes in the plant community caused by grazing could have bottom-up effects on species...

Resource Type:

Dissertation