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Filtering by: Creator Giguere, Andrew Advisor Myrold, David D. Resource Type Dissertation

An Examination of Factors Controlling the Activity of Ammonia- and Nitrite-oxidizers in Diverse Soils

Creator:

Giguere, Andrew T.

Abstract:

Nitrification is a critical step in the global nitrogen cycle involving the biological oxidation of ammonia (NH₃) to nitrite (NO₂⁻ ) and then to nitrate (NO₃⁻). The first step in nitrification is carried out by NH₃-oxidizing bacteria (AOB) and archaea (AOA), and the second by NO₂⁻-oxidizing bacteria (NOB). In addition...

Resource Type:

Dissertation

Full Text:

Andrew T. Giguere for the degree of Doctor of Philosophy in Soil Science presented on March 20, 2017
Impact of Dairy Manure Digestate on Microbial Activities in Soil

Creator:

Waggoner, Ashley L

Abstract:

Amendments and fertilizers applied to optimize crop production and improve soil health also supply inputs of soil organic matter (SOM) and nutrients that affect soil microorganisms. In the dairy-intensive Pacific Northwest, dairy manure is stored as slurry mixtures until conditions are appropriate for soil application. During storage, the manure begins...

Resource Type:

Dissertation

Full Text:

; Erguder et al., 2009; Giguere et al., 2015; Gubry- Rangin et al., 2017, 2011; Hatzenpichler, 2012; Taylor
Diversity and Activity of Microbial Extracellular Peptidases in Soil

Creator:

Nguyen, Trang T. H.

Abstract:

Soil nitrogen exists largely as organic matter, including plant liter, dead animal matter, and microbial necromass. About 90% of soil organic nitrogen is proteinaceous material that is too large for plants and microorganisms to assimilate directly. Protein depolymerization therefore plays a critical role in mobilizing this organic source of nitrogen,...

Resource Type:

Dissertation

Full Text:

Waggoner, Christopher Burgess, Stephany Chacon, Josh Neuman, Rachel Danielson, Nate Tisdell, Andrew