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Articles 1 - 14 of 14
Full-Text Articles in Life Sciences
Social Ecological Food Systems: Sustainability Lessons From Maine Dairy Networks, Julia B. Mcguire
Social Ecological Food Systems: Sustainability Lessons From Maine Dairy Networks, Julia B. Mcguire
Electronic Theses and Dissertations
Milk production has played an integral role in the culture, landscape, and economy of Maine’s agriculture. Maine dairy farmers have faced numerous sustainability challenges to economic, environmental, and social aspects of their industry. Like many other complex social ecological systems, the Maine dairy industry faces a gap between scientific knowledge and actionable management or policy. A cultural dichotomy exists between conventional and organic farming. Shifting the focus from this binary, metrics such as social capital may play a key role in solving sustainability issues. Difficulties arise in the governance of complex social ecological systems when the scales of assessment, management, …
Biological, Behavioral And Preventative Management Of The Invasive Insect Pest, Spotted Wing Drosophila (Drosophila Suzukii Matsumura), In Maine Lowbush Blueberry (Vaccinium Angustifolium Aiton), Gabe Alnajjar
Electronic Theses and Dissertations
This research was conducted in order to identify the potential for utilization of various management techniques against the invasive Drosophila suzukii Matsumura, commonly referred to as the spotted wing drosophila (SWD), using Maine lowbush blueberry (Vaccinium angustifolium Aiton) as a model crop system. These included evaluations of three prospective approaches often considered when developing agricultural pest management programs for novel insect pests: 1) biological control through the intended release of natural enemies, in this case entomopathogenic fungi; 2) behavioral management through mass trap deployment in order to capture and kill adult SWD, and; 3) prevention through the deployment of …
An Analysis Of The Demand For Rail Transportation Of Corn, Soybeans, And Wheat In South Dakota, Melinda Sommer
An Analysis Of The Demand For Rail Transportation Of Corn, Soybeans, And Wheat In South Dakota, Melinda Sommer
Electronic Theses and Dissertations
The cropping patterns, grain marketing flows, and transportation needs have changed in South Dakota as increased ethanol production has led to a significant increase in corn production and the production of distiller’s dried grains with solubles (DDGS) as a co-product. Previous studies have not focused specifically on the grain and oilseed transportation needs in South Dakota over an extended period of time that covers the influence of ethanol production. Quarterly rail data from the Surface Transportation Board Public Use Waybill Sample for 1991 to 2013 were used in a regression analysis of the demand for rail transportation of corn, soybeans, …
Investigating Grassland And Cropland Conversion Decisions In The Dakotas, 2015 Producers Survey And Analysis, Md Niaz Murshed Chowdhury
Investigating Grassland And Cropland Conversion Decisions In The Dakotas, 2015 Producers Survey And Analysis, Md Niaz Murshed Chowdhury
Electronic Theses and Dissertations
This study investigates grassland and cropland conversion decisions in the Dakotas. Data from a 2015 survey completed by 1,026 producers located in 57 counties of the Prairie Pothole Region (PPR) were used to evaluate land conversions. This thesis attempts to identify the land use conversion incidence and rate (grass to crop and crop to grass); the link between past and projected land use conversion decisions in the Dakotas, and determinants of land use conversion using different statistical tools, including logistic regression methods. A regional analysis of converted acres reveals that the grass to crop conversion rates (as percent of 2014 …
Temporal And Spatial Influences On South Dakota Farm Economies Of Size, Henry Brown
Temporal And Spatial Influences On South Dakota Farm Economies Of Size, Henry Brown
Electronic Theses and Dissertations
Census of Agriculture data are evaluated to test for economies of size of South Dakota farms. Economies of size occur when per-unit costs decrease as the size of a firm increases. This research measures technical economies of size, which assume that all firms pay identical input prices and receive identical output prices. The dependent variable of the model is expenses per dollar of sales. This is a typical measure of efficiency in agricultural statistics. The data come from the four prior Census of Agriculture years, 1997, 2002, 2007, and 2012. A state-wide model and a county-wide model were developed to …
Soil Salinity Study In Northern Great Plains Sodium Affected Soil, Tulsi P. Kharel
Soil Salinity Study In Northern Great Plains Sodium Affected Soil, Tulsi P. Kharel
Electronic Theses and Dissertations
Climate and land-use changes when combined with the marine sediments that underlay portions of the Northern Great Plains have increased the salinization and sodification risks. The objectives of this dissertation were to compare three chemical amendments (calcium chloride, sulfuric acid and gypsum) remediation strategies on water permeability and sodium (Na) transport in undisturbed soil columns and to develop a remote sensing technique to characterize salinization in South Dakota soils. Fortyeight undisturbed soil columns (30 cm x 15 cm) collected from White Lake, Redfield, and Pierpont were used to assess the chemical remediation strategies. In this study the experimental design was …
Evaluation Of Tillage, Crop Rotation, And Cover Crop Impacts On Corn Nitrogen Requirements In Southeastern South Dakota, Sara Louise Berg
Evaluation Of Tillage, Crop Rotation, And Cover Crop Impacts On Corn Nitrogen Requirements In Southeastern South Dakota, Sara Louise Berg
Electronic Theses and Dissertations
Nitrogen (N) is a vital factor of corn (Zea mays) production. Previous work in South Dakota has shown that there is uncertainty as to whether nitrogen requirements are the same for corn raised under no-till (NT) versus conventional till (CT) production systems. The objective of this study was to evaluate whether N requirements continue to be greater under long-term NT versus CT production systems in southeastern South Dakota, while also considering effects from cover crops and crop rotation. This was a two year study conducted at the SDSU Southeast Research Farm near Beresford, SD; it was superimposed on a long-term …
Relationship Of Grain Stocks And Farmer Marketings, Tyler Holmquist
Relationship Of Grain Stocks And Farmer Marketings, Tyler Holmquist
Electronic Theses and Dissertations
This research explores the relationship between quarterly grain stocks and monthly grain marketings. Reviewing when, how, and why stocks move from on-farm and off-farm inventories, an interpretation of quarterly commodity disappearance and crop marketings is formed. An explanatory model is first developed for farmer marketings, where price expectations are used to assess market signals to change ownership of crops. The model is applied to South Dakota corn, soybeans, and wheat from 1985 through 2015. The subsequent analysis contributes to a model that explains quarterly changes in stocks in terms of supply levels and the expected effect from marketings on disappearance. …
Response Of Soil And Water Quality To Winter Manure Application From Small Agricultural Watersheds In South Dakota, Shikha Singh
Response Of Soil And Water Quality To Winter Manure Application From Small Agricultural Watersheds In South Dakota, Shikha Singh
Electronic Theses and Dissertations
The extreme winter conditions prevailing in the state of South Dakota make it difficult for the livestock producers to manage the manure generated at the farm. The South Dakota Department of Environmental and Natural Resources does not recommend manure application in the state during the winter months when the ground is frozen. Thus, producers are left with the options such as storing the manure over a longer period until summer or spreading on snow or frozen ground. Storing manure for longer duration leads to increased risks of concentrated spills into the streams. Thus, it is important to develop management strategies …
Long-Term Impacts Of Annual Cattle Manure And Fertilizer On Soil Quality Under Corn-Soybean Rotation In Eastern South Dakota, Ekrem Ozlu
Electronic Theses and Dissertations
Dairy and beef manure have been used to enhance soil quality; however, their impacts under long-term application in corn-soybean rotation need to be evaluated. Nutrient based recommended rates of manure applications on soils are important and also need to be monitored. This study, therefore, was conducted at two long-term sites to assess the impacts of manure and inorganic fertilizer application rates on some of the soil quality indicators and greenhouse gas emissions (GHGs) in a corn (Zea mays L.) - soybean (Glycine max L.) rotation system located at Beresford and Brookings in Eastern South Dakota. Study treatments included: …
Demonstrating Short-Term Impacts Of Grazing Cover Crops On Soil Health In South Dakota, Colin Tobin
Demonstrating Short-Term Impacts Of Grazing Cover Crops On Soil Health In South Dakota, Colin Tobin
Electronic Theses and Dissertations
Grasslands have been rapidly converted to croplands over the last decade in the northern Great Plains. This conversion can reduce soil health and increase the region’s ability to pollute the Missouri and Mississippi rivers. Therefore, the need for integrated crop livestock (ICL) practices that can protect the region’s native prairies are strongly encouraged. Introducing livestock into arable cropping systems can improve nutrient cycling, soil health, and provide economic benefits. However, the detailed information about the impacts of ICL system on soil health is still lacking in the Northern Great Plains region. Therefore, the present study was conducted under a corn …
Attitude Comparison Among South Dakota Family Members Regarding Estate Planning And Farm Transitions, Heather Gessner
Attitude Comparison Among South Dakota Family Members Regarding Estate Planning And Farm Transitions, Heather Gessner
Electronic Theses and Dissertations
Estate planning and intergenerational farm transitions are the focus of research and extension programs across the nation due to the potential tax consequences faced by farm operations, retirement funding options available and utilized by farmers, changes in asset transition tools available, and communication (or lack of communication) issues related to bringing an heir back to the family operation.
Past plans for research projects and extension programming developed across the nation and in South Dakota (SD), were created with many assumptions regarding the attitudes of farm family members towards the transition of ownership of the operational assets and personal assets of …
Developing Management Guidelines That Balance Cattle And Timber Production With Ecological Interests In The Black Hills Of South Dakota, Kurt M. Chowanski
Developing Management Guidelines That Balance Cattle And Timber Production With Ecological Interests In The Black Hills Of South Dakota, Kurt M. Chowanski
Electronic Theses and Dissertations
Forested lands contribute to the United States (US) economy by providing livestock and timber production. Livestock grazing of forested lands has been widespread throughout the western US since the settlement era, and currently occurs on 51.4 million hectares (ha) representing 16% of all US grazing land and 22% of all US forested land (Nickerson et al. 2011). While livestock grazing and timber harvest are occurring on a substantial amount of forested land, relationships between management practices, tree stocking, timber production, forage production, livestock grazing, wildlife, aesthetics, and ecological integrity are not well documented. Whether considering timber or cattle, finding a …
Study Of The Effect Of Feeding Highly Digestible Corn Based Calf Starter On The Growth Performance Of Calves, Shruti Srivastava
Study Of The Effect Of Feeding Highly Digestible Corn Based Calf Starter On The Growth Performance Of Calves, Shruti Srivastava
Electronic Theses and Dissertations
New corn hybrids have been developed by Masters Choice (MC) that vary in energy density and starch digestibility. These MC hybrids have lower starch densities due to an altered starch structure, which allows for greater ruminal and intestinal starch digestion. The altered starch structure of these new hybrids results in reduced feed manufacturing costs (i.e., grinding). Thirty (30) 1 to 3 d old (40.6 ± 1.72 kg) Holstein heifer calves were randomly assigned to 1 of 2 calf starters to measure growth performance of Holstein heifer calves through 8 weeks of age. Treatments were: 1) Hard starch (HS) corn calf …