Index Catalog // ScholarsArchive@OSU

Transformations of sulfur in wetland rice soils

Creator:: Islam, M. Mujibul
Resource Type:: Dissertation
Full Text:: : Richard P. Dick In recent years sulfur (S) deficiency has emerged as constraint to rice production in

Effects of organic and inorganic soil amendments of phosphorus sorption

Creator:: Iyamuremye, Faustin
Resource Type:: Dissertation
Full Text:: or} Phosphorus Sorption Abstract approved: Richard P. Dick The effect of different rates of

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:: : Richard P. Dick Nitrogen availability in agricultural soils from fertilizer, plant residue inputs, and

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:: advisor, Richard Dick, who somehow managed to continue mentoring from across the country and globe. His

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:: approved: Richard P. Dick The Oregon Long-Term Soil Quality Project was initiated to identify soil

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:: : ___________________________________________________________________ Richard P. Dick Piliostigma reticulatum and Guiera senegalensis are two native shrubs that

The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

Creator:: Dossa, Ekw'e Lokossou, 1960-
Abstract:: Two native shrub species (Piliostigma reticulatum and Guiera senegalensis) are prominent vegetation components in farmers’ fields in Senegal. However, their role in nutrient cycling and ecosystem function has largely been overlooked. A study including both laboratory and field experiments was conducted to evaluate potential biophysical interactions of the two shrub...
Resource Type:: Dissertation
Full Text:: Abstract approved: Richard P. Dick Two native shrub species (Piliostigma reticulatum and Guiera

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:: . Abstract approved: Richard P. Dick

Designing and Using Multiplayer Tabletop Mathematics Learning Games

Creator:: Renne, Michael E.
Abstract:: Teachers may be attracted to the use of a game in a learning activity under the presumption that students will find the game experience to be more “fun” than typical classroom activities. The use of a game in a learning activity should help students attain important learning outcomes and engage...
Resource Type:: Dissertation
Full Text:: : ________________________________________________________________ Thomas P. Dick Teachers may be attracted to the use of a game in a learning activity

Building concept images--supercalculators and students' use of multiple representations in calculus

Creator:: Hart, Dianne K.
Abstract:: This study investigated how the use of supercalculators (HP 28S and HP 48SX) affects students' conceptual understanding of differential and integral calculus. Students (n = 324) from 12 institutions throughout the United States studied an experimental curriculum emphasizing multiple representations (symbolic, numerical, graphical). (The curriculum was developed through the Oregon...
Resource Type:: Dissertation

ScholarsArchive@OSU

Transformations of sulfur in wetland rice soils

Effects of organic and inorganic soil amendments of phosphorus sorption

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

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

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

The Biogeochemistry of nitrogen and phosphorus cycling in native shrub ecosystems in Senegal

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

Designing and Using Multiplayer Tabletop Mathematics Learning Games

Building concept images--supercalculators and students' use of multiple representations in calculus

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