Index Catalog // ScholarsArchive@OSU

Inorganic nitrogen and soil biological dynamics in cover crop systems

Creator:: Kauffman, Susan Muna
Resource Type:: Masters Thesis
Full Text:: seasonal trends in the soil biology can aid in understanding soil system NO3- dynamics. Biological trends

Soil biological indices and nitrogen availability during a simulated transition from inorganic to organic sources of nitrogen

Creator:: Fauci, Mary F.
Resource Type:: Masters Thesis

Soil biochemical measures as ecological indicators across agricultural and forest ecosystems of Oregon

Creator:: Knight, Timothy R.
Abstract:: A variety of soil properties have been proposed and tested as potential indicators of soil quality. This study was conducted in an effort to produce a standardized soil quality index for systems in Oregon. Soils in both forested and agricultural systems were sampled in a wide variety of locations, climates,...
Resource Type:: Masters Thesis
Full Text:: activity in the soil), total biomass C, total bacterial and fungal biomass, respiration, and soil

Fatty acid profiling of soil microbial communities : a comparison of extraction methods and temporal dynamics in plant residue amended soils

Creator:: Fernandes, Marcelo Ferreira
Abstract:: A method based on fatty acid (FA) analysis is used to profile microbial community structure (MCS). Various extraction protocols are available, which alter the types of FAs extracted from soils. The more time consuming but widely used protocol extracts only FAs from phospholipids (PLFA). This technique is desirable because PLFAs...
Resource Type:: Dissertation
Full Text:: methods were in the general fungal and arbuscular-mycorrhizal fungal markers that were related to the

Microbial community structure as influenced by season and stand age in a Douglas-fir (Pseudotsuga menziesii) ecosystem

Creator:: Kucera, Jennifer Moore
Abstract:: Forest harvest can have significant impacts on forest ecosystems that may influence the capacity of soils to sequester carbon (C). The microbial community controls decomposition, which is a critical process in partitioning litter- and root-C between CO₂ and storage in semi-permanent soil-C pools. The objectives of this study were to...
Resource Type:: Dissertation
Full Text:: season and secondarily by time since clear-cutting. Total microbial biomass and bacterial and fungal

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Creator:: Burket, John Zimmerman
Abstract:: Nitrogen availability in agricultural soils from fertilizer, plant residue inputs, and soil organic matter has important implications beyond crop yield. Legume winter cover crops and one fourth the recommended N rate on sweet corn resulted in yields equivalent to those at the recommended rate in the Willamette Valley of western...
Resource Type:: Dissertation
Full Text:: result in N availability in soils. Management of soils directly impacts soil biology, and results from

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Creator:: Schutter, Mary E.
Abstract:: The Oregon Long-Term Soil Quality Project was initiated to identify soil properties that respond rapidly to alternative management practices. Such practices included winter cover cropping, which was implemented at two experimental research stations and several grower fields throughout the Willamette Valley. The goal of this thesis was to identify the...
Resource Type:: Dissertation
Full Text:: of eukaryotic FAME markers compared to winter-fallow soils, suggesting greater fungal and protozoan

Activity, composition and structure of soil microbial communities in Savannahshrubs of agroecosystems in semi-arid Senegal

Creator:: Diedhiou, Sire
Abstract:: Piliostigma reticulatum and Guiera senegalensis are two native shrubs that coexist with row crops in parkland systems of the Sahel of Africa. Although permanently green all year around in soil depleted in nutrients and dry for a nine-month period, these shrubs have been largely overlooked. Conventional management of these shrubs...
Resource Type:: Dissertation
Full Text:: materials or stem/leaf mixes. Cellulase and β-glucosidase were highly correlated with the fungal markers

Organic soil amendements (sic) : impacts on snap bean common root rot and soil quality

Creator:: Cespedes Leon, Maria Cecilia
Abstract:: Common root rot is a major disease of commercially grown snap bean (Phaseolus vulgaris L.) on the irrigated sandy soils of central Wisconsin. The objective of this study was to determine the relationships between soil properties and suppressiveness to common root rot of snap bean (causal agent Aphanomyces euteiches) in...
Resource Type:: Masters Thesis
Full Text:: , fungal population activity decreased, but actinomycetes and bacterial populations increased. This is

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

Creator:: Bandick, Anna Katrina
Resource Type:: Masters Thesis
Full Text:: indicators of soil quality because of their relationship to soil biology, ease of measurement, and rapid

ScholarsArchive@OSU

Inorganic nitrogen and soil biological dynamics in cover crop systems

Soil biological indices and nitrogen availability during a simulated transition from inorganic to organic sources of nitrogen

Soil biochemical measures as ecological indicators across agricultural and forest ecosystems of Oregon

Fatty acid profiling of soil microbial communities : a comparison of extraction methods and temporal dynamics in plant residue amended soils

Microbial community structure as influenced by season and stand age in a Douglas-fir (Pseudotsuga menziesii) ecosystem

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Activity, composition and structure of soil microbial communities in Savannahshrubs of agroecosystems in semi-arid Senegal

Organic soil amendements (sic) : impacts on snap bean common root rot and soil quality

Field management effects on the thermal stability and activity of soil enzymes in whole soil and aggregates

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