bluuebunny/crossref_metadata_2025_split huggingface dataset:
Whole farm systems research: An integrated crop and livestock systems comparison study
Authors: Luna John , Allen Vivien , Fontenot Joseph , Daniels Lee , Vaughan David , Hagood Scott , Taylor Daniel , Laub Curtis 
Published: October 2009

AbstractTo examine the long-term productivity, profitability, and ecological interactions associated with whole farming systems, we established an interdisciplinary replicated comparison of a conventional and an experimental alternative crop-livestock farming system in southwest Virginia in 1988. The conventional system uses the best management practices commonly used in the mid-Atlantic region. The alternative system puts more emphasis on crop rotation, grazing and forage management, conservation tillage, cover crops, and integrated pest management. Each is managed as a year-round system, with management decisions based on the system's overall goals.The comparison is planned to run for 10 years, so that only preliminary conclusions can be drawn so far. These include the following: 1) similar total productivity can be achieved with either reduced or full use of herbicides and insecticides; 2) the need for N fertilization can be decreased using grazing management and short-rotation alfalfa; and 3) recycling of manure from cattle fed corn silage provides most nutrients needed for the following corn crop. The comparative profitability of the two systems has fluctuated among years, and it is too early to know which system is more profitable. The process of interdisciplinary systems research has increased our knowledge of total system interactions, challenged prior assumptions, and clarified the methodological problems of integrated systems research.
An interdisciplinary, experiment station-based participatory comparison of alternative crop management systems for California's Sacramento Valley
Authors: Temple Steven R. , Friedman Diana B. , Somasco Oscar , Ferris Howard , Scow Kate , Klonsky Karen 
Published: October 2009

AbstractIn 1989, a group of researchers, farmers and farm advisors initiated an interdisciplinary study of the transition from conventional to low-input and organic management of a 4-year, five-crop rotation. Crop yields initially varied among systems, but now appear to be approaching each other after a transition period that included the development of practices and equipment most appropriate for each system. Farming practices and crop production costs are carefully documented to compare the various systems' economic performance and biological risks. Supplying adequate N and managing weeds were challenges for the low-input and organic systems during the first rotation cycle, and experiments are being conducted on an 8-acre companion block to find solutions to these and other problems. Leading conventional and organic growers provide a much-needed farmer perspective on cropping practices and economic interpretations, because we try to provide “best farmer” management of each system. Research groups within the project are focusing on soil microbiology, economics, pest management, agronomy and cover crop management.
Addressing the challenges of sustainable agriculture research and extension at land-grant universities: Radially organized teams at Wisconsin
Authors: Stevenson G. W. , Posner Joshua , Hall John , Cunningham Lee , Harrison Jan 
Published: October 2009

AbstractResearchers at land-grant universities are under pressure to widen their research objectives, which requires them to expand their inquiry from a disciplinary base to a systems level, to include farmers and nonuniversity organizations as research collaborators, and to communicate with broader sectors of the public, such as consumers and policy makers. However, there are few rewards for scientists who undertake long-term, systems based research. An approach that brings together multidisciplinary, multiprofession teams using a radial model of organization has successfully addressed these challenges in Wisconsin. A small “hub” manages the team, with the remaining participants linked to component taskforces or “satellite” projects. This enables research to be done on both multidisciplinary and related single-discipline questions. Radially organized teams can attract diverse people with different time commitments and reward incentives. The research meets the criteria of public and academic audiences alike. For innovative research and extension efforts like radial teams to reach their full potential, larger institutional changes are needed within the land-grant system and professional agricultural societies.
Participatory assistance: An alternative to transfer of technology for promoting change on farms
Authors: Lanyon L.E. 
Published: October 2009

AbstractParticipatory assistance (PA) is a proposed approach for promoting change that involves both the biophysical processes of farms and the management processes of farmers. It integrates external expertise, inputs, and expectations with the unique character of a particular farming system. It focuses on improving the processes of the farm and farmer rather than on the traditional interests of “outsiders” such as disciplinary researchers, industry sales people, government regulators, consumers, or environmental interest groups. As an alternative to transfer of technology, it promotes learning both by the farmer and by specialists from academia, industry, government, and the public. Participatory assistance can promote innovations in the operation of farms, in the conduct of research and education, in the development of products and services, in the formulation of policy, and in the involvement of the public in agriculture. The outcome is not assumed to be the adoption of the “best” technology, but may be found in the emerging properties that result from innovations. Assessing the improvement that follows each innovation will require clear specification of the relevant performance criteria, provision of appropriate technical support, and reinforcement by the appropriate incentives. Reconciling today's farming with water quality protection illustrates the potential of the PA approach.
Mycorrhizae in sustainable agriculture. I. Effects on seed yield and soil aggregation
Authors: Bethlenfalvay Gabor J. , Barea José-Miguel 
Published: October 2009

AbstractVesicular-arbuscular mycorrhizal (VAM) fungi colonize plant roots and the surrounding bulk soil. They transport mineral nutrients from the soil to the plant and carbon compounds from the plant to the soil, and have pervasive effects on plant form and function and on the composition of the soil microbiota. This experiment evaluated VAM effects on plants and soil to determine if VAM fungi mediate a relationship between changes in seed yield and soil aggregation. In a pot experiment with peas, an isolate of the VAM fungus Glomus mosseae (Nicol & Gerd.) Gerd. and Trappe did not significantly affect seed yield (8%), but improved soil aggregation by 400% in one soil, a gray silt-loam high in organic matter (OM) and phosphorus. In another soil, a yellow clay-loam low in OM and phosphorus, seed yield was enhanced significantly (57%), but there was only a small change (50%) in aggregation. The results suggest that carbon allocation between the plant (measured as seed yield) and the soil (measured as the formation of water-stable aggregates) is influenced by this VAM fungus. The soil appeared to gain carbon at the expense of carbon lost by the plant Mycorrhizal fungi thus seem to affect two biologically controlled aspects of sustainable agriculture: plant production and soil quality.
Communicating between farmers and scientists: A story about stories
Authors: Connie  , Hatfield Doc , Preston  , Boop Wanda , William Ray D. 
Published: October 2009

Ranching in the 1990s involves vivid word pictures with emotions, learning, a bit of humor, and fierce independence, explained Connie, as students and resource specialists sat on hay bales in a small barn on the high desert in central Oregon. Rangeland Resource students listened, a high school English teacher listened, an Extension horticultural specialist listened, and a Bureau of Land Management ecologist listened along with the professor. A wagon wheel stood near a rusty bucket of sagebrush and bunchgrass. Doc contributed short stories, a few facts, and his perspective of the same events. As she continued, Connie looked toward Doc and wondered whether her story was pitched at about the right level of emotion; was she effectively describing their ranching experience in the 1990s? He smiled under a large grey cowboy hat as his boot rested on the wagon wheel. Everyone felt the tension. Inviting environmental advocates to their ranch … was this wise?Many experiences later, Doc says they have regained independence through collaborative learning with urban dwellers and consumers of their beef products. They welcome people with open minds toward learning. Their vision includes cattle, fish, and wildlife; the 7 inches of rain or snow that falls in winter and must be captured to sustain fish and urban dwellers in August; and sharing beliefs and values about the landscape while fish, grass, and ranchers survive.
Removing applied agricultural research from the academy
Authors: Lockeretz William 
Published: October 2009

AbstractApplied agricultural research that is concerned with highly specific production methods and growing conditions differs in its purposes and social value from more “academic” kinds of research intended to advance knowledge in a more general and less immediately practical way. Nevertheless, it is conducted in an institutional setting established largely for the latter kind of research. Many people have suggested that the resulting conflicts could be reduced by introducing greater flexibility into the professional reward system for agricultural researchers. However, the mismatch may go too deep to be fixed this way. An alternative would be to remove highly applied researchfrom the academic domain and treat it instead as a service to the university's outside constituencies. A service orientation is especially appropriate for publicly supported universities, which is where most such research is done.
Soil quality and profitability of biodynamic and conventional farming systems: A review
Authors: Reganold John P. 
Published: October 2009

AbstractBiodynamic and organic farming are similar in that both are ecologically oriented and do not use chemical fertilizers and pesticides. The main difference is that biodynamic farmers add eight specific amendments, called preparations, to their soils, crops, and composts. Recently, there has been an increasing interest in biodynamic farming practices and systems because they show potential for mitigating some detrimental effects of chemical-dependent conventional agriculture. Only a few studies examining biodynamic methods or comparing biodynamic farming with other farming systems have been published in the refereed scientific literature, especially in English. This paper summarizes data from previous studies, both published and unpublished (theses), that have compared biodynamic and conventional farming systems with respect to soil quality or profitability. These studies have shown that the biodynamic farming systems generally have better soil quality, lower crop yields, and equal or higher net returns per hectare than their conventional counterparts. Two studies that included organic management treatments with and without the preparations showed that the preparations improved biological soil properties and increased crop root growth. However, more research is needed to determine whether the preparations affect soil physical, chemical, and biological properties and crop growth and, if so, their mode of action.
The Wisconsin integrated cropping systems trial: Combining agroecology with production agronomy
Authors: Posner Joshua L. , Casler Michael D. , Baldock Jon O. 
Published: October 2009

AbstractTwo large-scale (25 ha) trials were initiated in 1989 in Wisconsin to compare six alternative production systems regarding productivity, profitability, and environmental impact. The project was designed and is managed by a coalition of farmers, extension agents and research personnel. Deliberations between production-oriented and ecologically oriented team members resulted in a factorial design, with two enterprise types (cash grain and forage-livestock) and three levels of biological complexity. Statistical methods have been used to identify the most efficient plot size, plot shape, and block shape, and the optimal procedures for sampling soil characteristics. A uniformity year was allowed before initiation of the trial, and the start was staggered. We defined treatments as production strategies rather than a specific set of inputs, which led to a more flexible plot management program.
Farmers' markets and the local community: Bridging the formal and informal economy
Authors: Lyson T.A. , Gillespie G.W. , Hilchey D. 
Published: October 2009

AbstractFarmers' markets are important but inadequately studied contributors to local economies. They allow individual entrepreneurs and their families to contribute to the economic life of local communities by providing goods and services that are not readily available through formal, mass markets, and they bring producers and consumers together to solidify bonds of local identity and solidarity. Using data collected from 115 farmers' market vendors in three regions of New York in 1993, we examined the characteristics and operations of three categories of vendors: full-time growers, part-time growers, and non-grower artisans and craftspeople. Drawing on theories of mass production and mass markets, we show how farmers' markets represent intermediate social structures that bridge the formal and informal sectors of the economy.
Minnesota extension agents' knowledge and views of alternative agriculture
Authors: Paulson Deborah D. 
Published: October 2009

AbstractI interviewed 19 county agricultural extension agents about their views of alternative agriculture as it is being promoted by sustainable agriculture groups in Minnesota. They varied considerably in how much they knew about it, their openness to it, and how heavily they were involved in it County extension agents share broad economic and environmental goals with sustainable farming advocacy groups, but many believe that agriculture is already working to meet those goals and are skeptical of the feasibility of alternative agriculture. Extension agents generally did not accept as realistic a primary social goal of sustainable agriculture advocates: maintaining the number of family farms. If county extension agents and sustainable agriculture groups in Minnesota are to work together for more sustainable agriculture, open discussion is needed on the goals of agriculture and visions for its future.
Västgötmodellen: Sweden's sustainable alternative for swine production
Authors: Honeyman Mark S. 
Published: October 2009

AbstractIn a harsh, northern climate and under restrictive animal welfare laws and a strict ban on the use of subtherapeutic antibiotics, Swedish pig farmers have developed a managementintensive system of pig production that relies on straw, the animals' natural behavior, group housing dynamics, and keen husbandry skills. The system is very efficient, with excellent pig reproduction and growth performance. The housing is simple and versatile. Called “Västgötmodellen” after the region in western Sweden where it was developed by farmers during the 1980s, the system now is successfully used on approximately 100 farms in Sweden. The system is specific to producing feeder or weanerpigs of 25 to 30 kg for feeding in more conventional European-style finishing units. Västgötmodellen may represent an agricultural system that is well adapted and economically competitive on modest-sized farms but not well suited for very large farms.
Intensive rotational grazing for dairy cattle feeding
Authors: Rust J.W. , Sheaffer C.C. , Eidman V.R. , Moon R.D. , Mathison R.D. 
Published: October 2009

AbstractA 2-year study compared milk production and profitability for confinement feeding versus rotational grazing. Guernsey and Guernsey x Holstein cows grazed perennial grass pastures from mid-May to October or were fed in confinement. Averaged over both years, confined cows produced 7% more milk; their milk was similar in fat concentration to that of grazing cows. Body weight changes and health of the two groups were similar. Net return per cow averaged $64 higher for rotational grazing than for confinement because of lower costs for feeding, facilities, equipment, and labor. Intensive rotational grazing of pastures is a competitive alternative for dairy cow feeding. However, farmers in the northern U.S. will still require stored feeds from late fall through early spring.
Adopting multidisciplinary approaches to sustainable agriculture research: Potentials and pitfalls
Authors: Stark C. Robert 
Published: October 2009

AbstractMultidisciplinary approaches are being attempted by agricultural research units along with their traditional single discipline approaches. Although single discipline research will still be needed, multidisciplinary approaches present special advantages.The potential value of multidisciplinary approaches to sustainable agriculture research will be viewed differently by researchers with different perspectives. The participants in this symposium, all of whom were experienced sustainable agriculture researchers, identified five areas as keys for success. First, to capitalize fully on the opportunities it provides, there must be a justification for using a multidisciplinary approach for the specific research topic; while some projects work best with a multidisciplinary approach, others are best done within a single discipline. Second, everyone involved, including administrators, must invest time and money to establish communication between the disciplines. Third, careful attention must be given to forming and operating multidisciplinary teams effectively so that they generate shared benefits. Fourth, new sources of research funds will become available as agencies adopt multidisciplinary approaches, and revised systems will be required to administer those funds at the university or research unit level. Finally, major adjustments in the present systems for promotion, tenure and publication are necessary to properly measure and distribute credit.
Trap cropping to manage the red sunflower seed weevil in oilseed sunflower
Authors: Brewer Gary J. , Schmidt Gene 
Published: October 2009

AbstractThe red sunflower seed weevil,Smicronyx fulvusLeConte, is a major pest of sunflower in North and South Dakota and Minnesota. Typically, insecticides are used to reduce oviposition and prevent economically damaging larval populations from developing. In a test of a reduced-pesticide alternative, we planted early maturing sunflower in the margins around commercial fields of oilseed sunflower. The margins flowered earlier than the field interiors and acted as a trap for the red sunflower seed weevil. They were treated with an insecticide while the trap rows were blooming and before the field interior began to flower. Conventional fields entirely treated with insecticide served as checks. We compared the trap and check fields with regard to yield, the fraction of larval-damaged seeds, and economic costs (insect damage and the cost of insecticide materials and application). Yield and larval damage of seeds were comparable between check and trap fields. However, the economic costs of weevil control in the check fields was greater than in the trap fields. Trap cropping is a recommended strategy for the red sunflower seed weevil, especially where economically damaging populations of the weevil are expected.
Low-input, on-farm composting of high C:N ratio residues
Authors: Churchill D.B. , Horwath W.R. , Elliott L.F. , Bilsland D.M. 
Published: October 2009

AbstractFarm residues with high C:N ratios are difficult to use because of their low economic value and excessive volume. Composting is ideal for upgrading such residues, but was not thought possible without co-composting or lowering of the C:N ratio. We developed a low-input method to compost perennial ryegrass straw on-farm by forming windrows and turning them either zero, two, four, or six times throughout the year with a commercial, straddle-type turner. No water beyond normal rainfall and no N other than that contained in the straw was added. The volume of straw was reduced by up to 88% with four or six turns over 20 to 24 weeks. The average internal temperature of straw windrows reached a maximum of 54°C with four turns. The ability to compost these residues will help in the development of sustainable farming systems by allowing recycling of straw waste.
Economic methods for comparing alternative crop production systems: A review of the literature
Authors: Roberts Wayne S. , Swinton Scott M. 
Published: October 2009

AbstractNew crop production technologies developed in response to growing concern over environmental contamination from agriculture may be neither more profitable nor higher yielding than the systems they replace, but they often reduce environmental contamination or improve soil and water quality. Systems designed with environmental objectives cannot be evaluated fairly just by productivity, which is what often is done in economic studies of alternative systems. We review 58 recent studies comparing alternative crop production systems to identify the key criteria for system comparisons, the system characteristics important in designing the analysis, and the methods most suited for comparing alternative systems.The four key criteria we looked for in system comparisons are expected profit, stability of profits, expected environmental impacts, and stability of environmental impacts. Most economic studies of crop production focus exclusively on profitability, and incorporate neither environmental criteria nor the dynamic characteristics inherent in alternative systems. We identify promising new approaches that take account of specific environmental characteristics and attempt to balance the objectives of profitability and environmental risk management. Balanced environmental-economic analysis is most likely to be achieved by integrating biophysical simulation models with economic optimization methods to model the trade-offs among profitability, environmental impact, and system stability (both financial and environmental).
Evaluating the sustainability of alternative farming systems: A case study
Authors: Ikerd John , Devino Gary , Traiyongwanich Suthijit 
Published: October 2009

AbstractThe sustainability of farming systems must be assessed by their potential environmental, economic, and social performance. We present a case study to illustrate an assessment of relative sustainability that uses all three performance criteria.We developed two scenarios for farmland currently enrolled in the Conservation Reserve Program (CRP) in Putnam County, Missouri: a conventional scenario reflecting farming practices typical of northern Missouri, and an alternative that we hypothesize to be more environmentally sound. We used selected economic and social indicators to assess whether the latter would be at least as economically viable and socially responsible as the conventional system.Estimated direct farm income was $3.4 million for the alternative and $2.4 million for the conventional scenario. The alternative system applies more labor and management to a given land resource and may support more farming families. Estimated total community economic impacts were 25% greater for the alternative than the conventional farming scenario. CRP land, therefore, could be returned to production in a way that could significantly enhance local economic and social benefits while retaining many of the CRP's environmental benefits.