<p>  </p> <p>While many studies have evaluated corn and soybean marketing strategies and crop insurance coverage levels separately, few studies have examined their interactions simultaneously.  This study evaluated the risk return tradeoff between marketing and crop insurance strategies in a portfolio context.  The Target MOTAD model was the primary method used to explore the tradeoffs between expected returns and downside risk.  On average, the hedge and roll strategy had the highest net return over the 30-year period for both corn and soybeans.  When corn and soybeans were evaluated separately, results indicated that the optimal combination of marketing strategies was not dependent on crop insurance coverage levels.  The strategies contributing to an optimal portfolio for corn were a mixture of the hedge and roll strategy, and the marketing year cash price strategy.  Combining the hedge and roll strategy with the marketing year cash price strategy was also optimal for soybeans.  When corn and soybean strategies were optimized simultaneously, however, optimal marketing strategies were dependent on the crop insurance coverage level chosen.  The optimal marketing strategies to mitigate risk for the 75 and 80 percent revenue protection plan included the corn hedge and roll strategy, the soybean marketing year cash price strategy, and the soybean six-month cash price strategy.  For the 85 percent revenue protection plan, the optimal marketing strategies were the corn hedge and roll strategy, soybean marketing year cash price strategy, and the soybean hedge and roll strategy. For the 90 and 95 percent supplemental coverage option (SCO) and enhanced coverage option (ECO) plans, the optimal marketing strategies were the corn marketing year cash price, the corn hedge and roll, and the soybean six-month cash price strategy. </p>

Master of Science

Master of Science

A profit maximizing linear programming model was developed. The model was fitted to a demonstration farm having a forage based livestock feeding system. Restraints where the resources of the McCoy farm in Rockbridge County, Virginia, which included limited pasture, labor, storage availability, and limited financial resources. Row crop production was an option not considered. Only variable costs of production were considered as fixed costs continue in the absence of production. Forage and livestock species used in the model were currently in existence on the farm. Estimated productivity levels were also based on actual farm data and were used to establish the upper limits of forage production. Results of the analysis indicate that alfalfa hay held for sale was the most profitable single enterprise. Grass hay was produced and fed to meet the livestock requirements during February and March. A fall calving cow-calf herd, with calves being marketed, at 634 pounds on September 30 was more profitable than marketing during July at lighter weights even though this system had higher forage requirements. Neither a spring calving cow herd or the purchase of stocker calves for summer grazing ensured the optimal farm plan as forage was better utilized by the fall herd. Seventy three fall calving cows and 152 winter lambing ewes were in the optimal plan. The ratio of fall calving cows to winter lambing ewes was 1 : 2. Stocking ratios between cows and ewes were dependent upon price relationships used and could vary with differing price relationships between feeder calves and slaughter lambs. Stocking rates were limited most by the availability of the improved and unimproved pastures. All available labor was used during November through May. Additional labor had to be hired to offset labor shortages during January through May. Financial resources of the farmer were adequate to meet the variable costs of production without additional use of borrowed capital. / M.S.

The colored farmers in Nansemond County suffered severely during 1932 from both low prices which they received for their products and weather conditions. The average capital for the farms studied was $2,556, of which 88.2 per cent was invested in real estate. the total capital invested per farm varied from about $1000 to about $5000. / Master of Science

Thesis (M. Tech.) - Central University of Technology, Free State, 2011

Thesis (MPhil (Agricultural Economics))--University of Stellenbosch, 2005. / The Dorper Sheep species are exclusively bred for the dry arid conditions of some parts of South Africa. This species adapts easily and a prime lamb with great characteristics can be produced. There are two very important controlable factors regarding Dorper sheep farming namely herd management and cultivation. Herd management involves feeding, mating, mating methods and the handling of animals and their products. A few good objectives of herd management are the short breeding interval, low deaths and high performance rating. Genetic improvement can be achieved by using good rams, the selection of ewe-lambs as forthcoming breeding ewes, culling of uneconomic producers and the application of good breeding practices to improve meat production and reproduction. In this study a comparison is made between the management practices (herd management and cultivation) of Dorper farmers in 1990 and the management practices of Dorper farmers in 2004. For this aim the research of J.J. Ackermann (1990) was used. In 2004 questionnaires were send to Dorper farmers throughout South-Africa to get more information about their management practices. The conclusion of the study was that there was an increase in tertiary qualification of Dorper farmers from 1990 to 2004 and that more farmers used modern practices instead of the old traditional methods.

Agricultural economists have devoted considerable attention to the financial stress situation of agricultural producers. Many studies have been conducted in various regions of the U.S. in an attempt to better understand the causes of the problem. The costs associated with farm financial stress imply corresponding benefits to be realized by its reduction. Benefits of studying and resolving farm financial stress reach beyond the farms and ranches to many related sectors such as rural communities, agribusinesses, and lending institutions. The specific hypothesis tested in this thesis is as follows: some but not all farms and ranches which have undergone serious financial stress in the early part of the 1980's in Oregon can be assisted in withstanding fluctuations in economic conditions by adopting specific strategies which promote financial stability and profitability. One of the specific objectives of this thesis was to evaluate the level of financial stress for two different agricultural production units in Oregon under differing leverage positions, and macroeconomic conditions. The production units selected for study were a cattle ranch and a wheat farm, based on their relative importance to Oregon. This first objective was satisfied through analysis of a baseline scenario, which was essentially a continuation of current conditions. Debt levels and growth rates were then altered to reflect the desired study conditions. Changing and considering three leverage ratios (20%, 40%, and 70%) and three sets of macroeconomic conditions (baseline, pessimistic, and optimistic) allowed studying of nine alternative situations to the base firm type or a total of 18 alternatives. Analysis of these different alternative production units was accomplished through a deterministic computer-based simulation model. The model simulates the financial structure and performance of a farm business over a transition period of four years with emphasis placed on the financial transactions of the firm. These transactions include purchases and sales of farm assets, financing terms, debt management, cash flows, tax obligations, consumption levels, and growth rates. The computer-based model made necessary calculations of cash flows and changes in financial statements to derive the ratios used for financial analysis over the planning horizon of four years beyond the present input case and is deterministic in the sense that all essential variables are entered by the researcher. Output from this model includes a set of coordinated financial statements for the firm over the planning horizon: a balance sheet, an income statement, statements for changes in net worth, flow of funds statement, and a fund availability report. The model also calculates profitability, liquidity, and solvency ratios used in financial ratio analysis which are provided on a summary sheet. These statements and reports are provided on an annual basis; thus, financial information is provided on yearly changes in financial position over the four year horizon. Another objective of this thesis was to evaluate various policy and management strategies designed to reduce financial stress. This objective was achieved by analysis of various scenarios designed to reduce stress simultaneously with the baseline case, which served for comparison. The specific scenarios considered were: 35% reduction of debt, 35% reduction of interest rates, two year deferral of debt, sales of 35% of total assets with no lease back, sales of 35% of total assets with lease back arrangements, and an infusion of equity capital equal to 35% of total debt. Results from this analysis were intended to show what, if any, courses of action could be pursued by agricultural firm managers and policy makers to reduce farm financial stress. The best test of the ability of these scenarios to reduce financial stress occurred in application to the high leverage wheat farm situations, as these were the cases with the most financial stress. Appropriate programs could be adopted to strengthen the financial position of the farm; in the case of low liquidity, asset sales-lease back; in cases of low solvency, equity infusions; and in circumstances where profitability needs to be enhanced, interest reductions would be the best choice. The results also seemed to suggested that public programs can maintain current levels of financial performance for producers under financial stress but do little to improve those positions. / Graduation date: 1988

Pucciniomycotina is a subphylum with a high diversity in terms of habitat and life history strategies that include plant parasites, animal associates (including opportunistic human pathogens), saprobes and antagonists of other fungi. The class Cystobasidiomycetes within this subphylum is a representative of such diversity and remains understudied. Their role in nature and the associations they establish with their hosts for most of the species is still unknown. In this study we used taxonomic and phylogenetic methods to present an inventory of strains in this class collected for more than 20 years from all over the world and preserved in the Aime Lab Culture Collection. Molecular and morphological data for six new species in the genera <i>Bannoa, Buckleyzyma</i>, <i>Halobasidium</i> and <i>Sakaguchia </i>were also presented. Additionally, mating experiments were performed by pairing strains of <i>Bannoa</i>; this is the second time in the genus that clamp connections and basidia are observed. We also found that newly described species of <i>Bannoa</i> can be co-inhabitants of sori of rust fungi. In general, antagonistic interactions can occur through: 1) direct physical contact between two fungi, i.e., mycoparasitism; or, 2) the production of antimicrobial compounds. In the Cystobasidiomycetes, direct physical antagonistic interaction which is associated with sexual states has been reported in species of Cystobasidium, Naohidea, Cyphobasidium and Occultifur. On the other hand, the production of antimicrobial compounds which mainly occurs between the yeast stage of the fungi and other organisms has only been reported in Cystobasidium pallidumand Hasegawazyma lactosa. We also hypothesize that the common ancestor to Cystobasidiomycetes is a mycoparasite due to the fact that this life strategy is present in most of the lineages in the class. To test this hypothesis, we grouped into five categories the host association or substrate from which strains of extant species in the Cystobasidiomycetes were isolated, i.e.,animals, plants, fungi, aquatic or decaying organic matter. We constructed a resolved phylogeny for the class based on seven locito study the evolutionary origins of mycoparasitism through ancestral character reconstruction with representation of all described species. Our analysis suggests that the most likely hypothesis is that the most recent common ancestor of the Cystobasidiomycetes was associated to fungi.<br>

<p></p><p>It is estimated that in the United States, agronomic weeds are responsible for about 50% of crop yield loss, costing nearly $27 billion each year. As interest in cover crops across the Midwest increases, so does the need to understand when to terminate cover crops for maximum weed control while still maintaining crop yield. Field experiments were conducted in 2017 and 2018 in Indiana to evaluate the effect of cover crop termination timings on weed control, and corn and soybean yield. Cereal rye (<i>Secale cereale </i>L.) and canola (<i>Brassica napus </i>L.) were subjected to early- or late- termination utilizing glyphosate-, saflufenacil- or glufosinate-based burndown herbicide programs. In corn, cereal rye and canola reduced early season weed biomass by 58 to 67% compared to fallow (no cover crop) plots. Cereal rye and canola reduced horseweed (<i>Erigeron canadensis </i>L.) and giant ragweed (<i>Ambrosia trifida </i>L.) emergence by 42 to 50% compared to fallow plots. Early- and late- terminated cereal rye reduced corn yields by 55 to 67% (5,173 to 7,116 kg ha^-1) compared to canola or fallow plots. In soybean, cereal rye and canola reduced early season weed biomass by 73 to 88% compared to fallow plots. Cereal rye and canola reduced horseweed emergence in 2017 and 2018 by 16 to 67 % compared to fallow plots. In 2017, both cover crop and termination timing influenced giant ragweed emergence. Early- and late- terminated cover crop plots reduced giant ragweed emergence by 50 to 76% compared to fallow plots. In 2018, cover crop termination timing influenced soybean yield. Late-terminated plots reduced yields by 48% compared to early-terminated plots. Results from this study suggest that cereal rye and canola planted at these rates can be effective for weed suppression prior to corn and soybeans, however, yield loss in both corn and soybean is expected. </p><p>Reports from Indiana in 2015 suggested that growers planting canola as a cover crop were experiencing difficulties when terminating with glyphosate prior to corn and soybean production. This suggests the utilization of inadequate herbicide programs, or perhaps a seed contamination event containing glyphosate resistant canola. Field experiments were conducted in 2016 and 2017 to determine the most effective herbicide treatment for terminating glyphosate resistant canola in Indiana, and to quantify how these herbicide programs influence corn yield. Canola was planted in early September and herbicide treatments were applied in the spring three weeks before corn planting. Visual ratings of control and above-ground biomass reduction were collected 21 days after treatment (DAT). The highest control of canola occurred following the application of paraquat + saflufenacil + 2,4-D or metribuzin, resulting in 88 to 94% control. These control ratings are supported by applications with paraquat + saflufenacil + 2,4-D or metribuzin resulting in 88 to 97% biomass reduction. Auxin herbicides alone provided very poor control, less than 41% at both locations. In general, saflufenacil-containing herbicide treatments provided the highest control of canola compared to mesotrione or atrazine. Herbicide treatments had no effect on corn grain yield.</p><br><p></p>