نتایج جستجو برای: farm heterogeneity
تعداد نتایج: 132579 فیلتر نتایج به سال:
Environmental problems in agriculture have proven difficult to address due to the spatial heterogeneity and temporal variability intrinsic to agriculture. Agriculture is largely a struggle against nature; both its sustainability and the prospects for improving environmental performance and farm income simultaneously are thus inherently limited. Agriculture’s high degree of variability makes dir...
Building on existing work evaluating food-attribute labels, we use data collected in 2010 from a national web-based survey of 1,002 households to examine consumer inferences and valuations of food products promoted as “sustainably produced.” A best-worst scale framework was implemented to identify how consumers de ine “sustainably produced” and their preferences for each of the sustainable farm...
Climate change mitigation in the agricultural sector is a key policy goal. Marginal abatement cost curves allow comparing cost-effectiveness of greenhouse gas measures. Existing studies often do not account for heterogeneity farms and interactions between The objective this study to present new approach that allows calculation marginal curve considers farm level interaction effects climate We a...
Modern theories of trade and economic geography consider the role product differentiation under monopolistic competition in manufacturing, assumption that agriculture produces homogeneous goods. By contrast, agribusiness studies examine case active high-productivity entrepreneurs who pursue by creating new products. To reconcile these two contradicting views agriculture, we incidence farm heter...
In recent years decentralized development approaches have gained prominence in the agricultural sector. A host of community based watershed management projects have been implemented that encourage community organizations to undertake management of previously government controlled irrigation systems and forests. Community organizations have been given the responsibility of managing water distrib...
An analytical model is developed to explain the increasing tendency of pork packers to produce their own hogs, based on Grossman and Hart’s property rights theory of the firm. Packer upstream integration is linked to the need to align packer-producer investment incentives in an environment marked by increasing hog buyer consolidation, changing consumer demands, moves toward traceability in the ...
OBJECTIVE We estimated 2,4-dichlorophenoxyacetic acid (2,4-D) exposure and systemic dose in farm family members following an application of 2,4-D on their farm. METHODS Farm families were recruited from licensed applicators in Minnesota and South Carolina. Eligible family members collected all urine during five 24-hr intervals, 1 day before through 3 days after an application of 2,4-D. Exposu...
With the continuing pressure on Australia’s water resources and interand intra-annual rainfall variability, farmers, especially in rainfed agricultural and pastoral zones, have been developing farm dams as a mean of providing additional water sources for irrigation and stock. The density of farm dams has increased over time, and an accurate knowledge of the spatial distribution of farm dams is ...
Effects of agricultural intensification (AI) on biodiversity are often assessed on the plot scale, although processes determining diversity also operate on larger spatial scales. Here, we analyzed the diversity of vascular plants, carabid beetles, and birds in agricultural landscapes in cereal crop fields at the field (n = 1350), farm (n = 270), and European-region (n = 9) scale. We partitioned...
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