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Registros recuperados: 3
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Does soil management system affect C content of a coarse sandy loam Amazonian Acrisol? Repositório Alice
AQUINO, I. O. de; DICK, D. P.; COSTA, F. de S..
The impact of No-till on the soil C content in comparison to Conventional Tillage (CT) depends greatly on the soil type, climate and initial C content. The main goal of this work was to investigate the effect of conservation soil management systems on the C content and humification in an Acrisol profile, Acre State, BR.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Propiedades químicas del suelo; Resistencia biológica; Cero labranza; Suelo franco arenoso; Acrisoles; Cultivo secuencial; Yuca; Abonos verdes; Maíz; Acre; Amazônia Ocidental; Western Amazon; Amazonia Ocidental; Química do Solo; Resistência Química; Composto Orgânico; Plantio Direto; Solo Arenoso; Cultivo Continuo; Mandioca; Manihot Esculenta; Adubação Verde; Milho; Zea Mays; Soil chemical properties; Biological resistance; No-tillage; Sandy loam soils; Acrisols; Sequential cropping; Cassava; Green manures; Corn.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1103150
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Intellectual Property Rights and Crop-Improving R&D under Adaptive Destruction AgEcon
Yerokhin, Oleg; Moschini, GianCarlo.
This paper studies how the strength of intellectual property rights (IPRs) affects investments in biological innovations when the value of an innovation is stochastically reduced to zero because of the evolution of pest resistance. We frame the problem as a research and development (R&D) investment game in a duopoly model of sequential innovation. We characterize the incentives to invest in R&D under two competing IPR regimes, which differ in their treatment of the follow-on innovations that become necessary because of pest adaptation. Depending on the magnitude of the R&D cost, ex ante firms might prefer an intellectual property regime with or without a "research exemption" provision. The study of the welfare function that also accounts for...
Tipo: Working or Discussion Paper Palavras-chave: Biological resistance; Intellectual property rights; Markov perfect equilibrium; Patents; Research exemption; R&D; Sequential innovation; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2007 URL: http://purl.umn.edu/10008
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Western bean cutworm survival and the development of economic injury levels and economic thresholds in field corn. Repositório Alice
MORAES, S. V. de P.; HUNT, T. E.; WRIGHT, R. J.; HEIN, G. L.; BLANKENSHIP, E. E..
Western bean cutworm, Striacosta albicosta (Smith) (Lepidoptera: Noctuidae), is a native pest of dry beans (Phaseolus vulgaris L.) and corn (Zea mays L.). Historically, the western bean cutworm was distributed in the western United States, but since 1999 eastward expansion has been observed. In corn, economic impact is caused by larval ear feeding. Information on western bean cutworm biology, ecology, and economic impact is relatively limited, and the development of economic injury levels (EILs) and economic thresholds (ETs) is required for more effective management. Studies during 2008Ð2011, across three ecoregions of Nebraska, sought to characterize western bean cutworm survival and development of EILs and ETs. Calculations of EILs and ETs incorporated...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Resistência larval; Nivel de dano ecônomico; Western bean cutworm; Striacosta albicosta; Lagarta; Praga de planta; Feijão; Milho; Lagarta rosca; Richia albicosta; Biological resistance; Larval development; Economic threshold; Pests; Bean; Corn; United States.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/974639
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