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Three essays on phosphorus runoff and water quality
(University of Missouri--Columbia, 2019)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Water pollution caused by nutrients, and the resulting eutrophication, have increased over time. This water pollution is increasingly caused by non-point source pollution, both...
Roadway effects on the hydrologic regime of temporary wetlands in the Missouri River floodplain in Missouri
(University of Missouri--Columbia, 2005)
on the hydrologic regime of temporary wetland basins within the agricultural landscape of the Missouri River floodplain from Hartsburg to Independence, Missouri. This study is part of a larger existing research project designed by the Missouri Department...
Factors influencing students' self-perceived levels of civic responsibility during FFA sponsored civic engagement activities
(University of Missouri--Columbia, 2012)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The purpose of this study was to determine the influence of involvement level, autonomy, and reflection during FFA civic engagement activities on students' self-perceived civic...
Three essays on the competitiveness of the US corn seed industry
(University of Missouri--Columbia, 2010)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] This dissertation provides an analysis of various aspects of the competitivity of the US corn seed industry. In the first essay I develop a price depend model of seed demand...
Potential agricultural insecticide exposure of Indiana bats (Myotis Sodalis) in Missouri
(University of Missouri--Columbia, 1998)
species (M. lucifugus, the little brown bat, and M. septentrionalis keenii, the northern long-eared bat) were collected from northern Missouri agricultural sites and from winter hibernacula in non-agricultural southern parts of the state to assess...
Overseeding annual ryegrass and cereal rye into soybean for winter forage and as a cover crop for weed control and soil conservation
(University of Missouri--Columbia, 2005)
had crude protein levels of more than 170 g kg-1 and neutral detergent fiber of less than 559 g kg-1. The overseeded treatments had at least 60% more residue cover and at least 70% less weed cover than did the control plots. Corn yield in the following...
Investigations of the forage nutritive value of common weeds encountered in Missouri pastures and their relationships with soil fertility
(University of Missouri--Columbia, 2019)
During the 2015, 2016, and 2017 growing seasons, a survey of 63 pastures in Missouri was conducted to determine the effects of selected soil and forage parameters on the density of common annual, biennial, and perennial weed species. Permanent...
Soil surface-seal measurement using high-resolution x-ray computed tomography (HRCT)
(University of Missouri--Columbia, 2006)
Rainfall on bare soil breaks soil aggregates, detaching particles, plugging pores and decreasing porosity in the top few mm of soil. This reduces hydraulic conductivity and increases runoff through a process known as surface ...
Degradation and transport of veterinary antibiotics and estrogens in a vegetated buffer strip system
(University of Missouri--Columbia, 2022)
properties that enhance the removal of organic pollutants and thus may be a useful tool for mitigating VA and estrogen transport from agricultural lands. Native warm-season grasses used in VBS have shown to enhance soil quality by stimulation of microbial...
Regulation of Gene Expression by Non-coding RNAs in Arabidopsis and Brachypodium
(2014)
Expansion of high-throughput sequencing technology has increased our understanding
in the importance of pervasive transcription and the resulting indispensable molecules, noncoding
RNAs (ncRNAs). A significant effort has ...
Computational methods to identify ionomic candidate genes in plants
(University of Missouri--Columbia, 2023)
[EMBARGOED UNTIL 12/1/2024] High throughput phenotyping and quantitative genetics have enabled researchers to identify genetic regions associated with changes in phenotype. However, going from GWAS loci to candidate genes ...
Estimation of demand parameters : an empirical analysis of consumer behavior in the United States
(University of Missouri--Columbia, 1971)
estimates of demand elasticities (price and income) for major commodity groups, e.g., food, clothing, etc. are reported. Chapter V contains estimates of price and income elasticities of demand for food and non-food commodity groups. The statistical...
A study of the property rights constraints in US agricultural cooperatives : theory and evidence
(University of Missouri--Columbia, 1998)
This research addresses the issue of efficient user-owned and controlled organizational design. Using agricultural cooperatives as an example set of user-owned and controlled institutional arrangements, the economic issue examined is the degree...
Physiology of glyphosate-resistant johnsongrass and implications for management
(University of Missouri--Columbia, 2022)
and widespread adoption of glyphosate resistant crops, the amount of glyphosate applied to agricultural land increased dramatically. In 2016, a producer reported a failure of glyphosate to control johnsongrass within an agronomic field in Buchanan County, MO...
Nested association mapping and accuracy of predicting genomic breeding value for agronomic and seed composition traits in three interspecific soybean populations
(University of Missouri--Columbia, 2019)
, and PI522226). Field tests were conducted in Albany, Columbia, Novelty and Rock Port, Missouri for two years, 2016 and 2017, in an augmented incomplete block design with one replication in 2016 and two replications in 2017. The nested association mapping...
Polyacrylamide amendment for erosion and runoff control on soils of differing characteristics
(University of Missouri--Columbia, 2009)
The use of anionic polyacrylamide (PAM) as a soil amendment is an emerging conservation practice. However, guidelines have not been developed with considerations of soil properties and topographic characteristics. The ...
Integrating cover crops into crop rotations in upstate Missouri
(University of Missouri--Columbia, 2018)
"There is an increasing emphasis on management strategies such as reduced tillage, use of cover crops, and implementation of conservation practices (i.e. terraces, no-till, and cropping systems) in Missouri cropping systems. By combining best...
A comparison of forest change detection methods and implications for forest management
(University of Missouri--Columbia, 2005)
technique used extensively in the eastern United States for forest change detection. This project tested the usefulness of this easy and inexpensive technique by applying it to the Missouri Ozark forest landscape in order to detect changes in forest biomass...
Role of microRNAs in the legume - rhizobium nitrogen fixing symbiosis
(University of Missouri--Columbia, 2019)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Nitrogen is a macronutrient that is critical for plant growth and development because it provides the building blocks of nucleic acids, proteins, chlorophyll, and energy...
Bridging the electronic gap : use of the internet by community newspapers
(University of Missouri--Columbia, 2011)
As increasing technology adds new avenues to the field of journalism, it is important to consider the ways journalism can be enhanced by adopting such technologies. Journalism is a field where the adoption of new technologies ...