نتایج جستجو برای: industrial agriculture
تعداد نتایج: 208246 فیلتر نتایج به سال:
An updated short account is given of the nature and practice of biological control. It includes data on key mechanisms of biocontrol agents (bca’s) being studied, relationships between bca’s and plants being investigated and commercialization prospects in modern world agriculture. Based on the voluminous literature on biological control research and application, successful cases are selected an...
Agriculture is a diverse field that produces a wide array of products vital to society. As global populations continue to grow the competition for natural resources will increase pressure on agricultural production of food, fiber, energy, and various high value by-products. With elevated concerns related to environmental impacts associated with the needs of a growing population, a life cycle as...
During the last 50 years, agricultural intensification has caused many wild plant and animal species to go extinct regionally or nationally and has profoundly changed the functioning of agro-ecosystems. Agricultural intensification has many components, such as loss of landscape elements, enlarged farm and field sizes and larger inputs of fertilizer and pesticides. However, very little is known ...
The demographic transitions here are associated with: 1) The shift from hunting and gathering to agriculture. 2) The industrial revolution. There are puzzles associated with both of these. In the neolithic transition to agriculture, humans became less well-fed, smaller, more prone to disease and lived shorter lives. Why then was this new system chosen? During the second, or “recent,” transition...
The potential for genetically modified (GM) crops to threaten biodiversity conservation and sustainable agriculture is substantial. Megadiverse countries and centers of origin and/or diversity of crop species are particularly vulnerable regions. The future of sustainable agriculture may be irreversibly jeopardized by contamination of in situ preserved genetic resources threatening a strategic r...
This paper provides an analytical review of empirical studies into the impact of schooling on entrepreneurship selection and performance in less developed countries. We analyze the variation of this impact across countries, estimation methods, definition of entry and performance, and the use of control variables. We find that one year of schooling raises enterprise income by an average of 5 per...
McWilliams explored the injustices of migratory farm labor in California. Yet his description of the rural California landscape at that time captures the essential characteristics of the predominant form of agricultural production in the United States today: Travelers along the highways pass through orchards that seem literally mea-sureless and gaze upon vast tracts of farm land stretching away...
Introduction The viability of rural communities and methods of food production is central to the health of the environment as well as humanity. So mounting evidence of the destructive and unsustainable ways more and more food is produced today is especially alarming. The prevailing model of economic development, widely referred to as globalization or neoliberalism, includes massive export-orien...
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