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Autor: Karlen, D.L.;Varvel, G.E.;Bullock, Donald George;Cruse, R.M
Título: Crop rotations for the 21st Century.
Fuente: Advances in Agronomy (USA).
Idioma: eng.
P.imprenta: 1994.53:1-45.
Descriptores:Rotational cropping;Crop yield;Water use;Nutrient uptake;Pest control;Disease resistance;Allelopathy;Biodiversity;Soil chemicophysical properties;Land use;Agricultural policies;EconomicsRotación de cultivos;Rendimiento de cultivos;Uso del agua;Absorción de sustancias nutritivas;Control de plagas;Resistencia a la enfermedad;Alelopatía;Biodiversidad;Propiedades fisico-químicas suelo;Utilización de la tierra;Política agrícola;EconomíaJournal articles;Artículos en revistas;Arreglo y sistemas de cultivo;Economía y políticas agrícolas;Conservación de la naturaleza y recursos de la sierraCropping patterns and systems;Agricultural economics and policies;Nature conservation and land resources
2do.Resumen: Advantages and disadvantages of crop rotation have undoubtedly been debated for thousands of years, as documented by historians (White, 1970b) who have stated that rotation systems were widely recommended by Roman agronomists, but often not adopted by local farmers. One reason for farmer hesitancy to use crop rotation may be that agricultural scientists are still unable to explain the mysterious "rotation effect." Macroeconomic and microeconomic considerations have and presumably will always influence land use decisions, such as adoption of crop rotation. For the U.S. corn belt, this was well documented by Wiancko (1927), but economic considerations must include a more complete accounting for both on-site and off-site impacts of our soil and crop management practices. Benefits of crop rotation for land and water resource protection and productivity have been identified, but processes and mechanisms responsible for those benefits need to be better understood. This is a critical area for basic and applied research. Public policies that influence land use decisions, such as crop rotation, need to be as flexible as possible to encourage adoption of practices that are economically viable, environmentally sustainable, and socially acceptable. Following this agenda will ensure that crop rotations have a major role in 21st century agriculture.


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