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Registros recuperados: 7
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Abundance and diversity of soil mites of fragmented habitats in a biosphere reserve in Southern Nigeria PAB
BADEJO,MOSADOLUWA ADETOLA; OLA-ADAMS,BUNY AMIN.
Soil samples were collected from the top 7.5 cm of soil in a Strict Natural Reserve (SNR), a surrounding buffer zone, a cassava farm and matured plantations of Gmelina, teak, and pine, so as to determine if plantation establishment and intensive cultivation affect the density and diversity of soil mites. Altogether, 41 taxonomic groups of mites were identified. The diversity and densities of mites in within the SNR, the buffer zone and the Gmelina were more than the diversity and densities in the cassava farm, teak and pine plantations. Each plantation had its own unique community structure which was different from the community structure in the SNR plot. The SNR plot and Gmelina were dominated by detritivorous cryptostigmatid mites unlike teak and pine...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cassava; Gmelina; Plantations; Soil fauna; Intensive farming.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000001100001
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Are eucalypts Brazil's friend or foe? An entomological viewpoint Anais da SEB
Majer,Jonathan D.; Recher,Harry F..
Vast areas of Brazil are being planted to Eucalyptus in order to provide renewable sources of timber, charcoal and cellulose. Although the rapid growth and productivity of various Eucalyptus species undoubtedly relaxes the pressure on logging of native forests, there are ecological costs. Firstly, some eucalypt species are vulnerable to pest outbreaks. A large number of native Lepidoptera, Coleoptera and leaf-cutting ants (Atta spp.), some of which have become pests, have been found on eucalypts growing in Brazil. Probably, the diverse myrtaceous flora of South America supports a fauna that can adapt to the introduced Eucalyptus species. Secondly, the leaf litter produced under Eucalyptus plantations differs substantially from that of native forests both...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Biodiversity; Conservation; Eucalyptus; Plantations; Pests.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591999000200001
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Cultivo da bananeira irrigada no Submédio São Francisco. Infoteca-e
BORGES, A. L.; FLORI, J. E..
A cultura da banana está presente em todos os estados brasileiros, sendo a fruta com maior volume de produção após as frutas cítricas. Planta de demanda hídrica relativamente elevada, a bananeira desempenha papel preponderante na maioria dos perímetros irrigados no Nordeste do Brasil, incluindo a região do Submédio São Francisco. A obtenção de altas produtividades da cultura, com a qualidade da fruta conforme demandas dos mercados, exige o uso de técnicas adequadas e a atenção especial dos produtores em todas as fases do seu cultivo. Ciente disso, a Embrapa Mandioca e Fruticultura, situada em Cruz das Almas, BA, em parceria com a Embrapa Semiárido, localizada em Petrolina, PE, elaborou este sistema de produção para a cultura irrigada da bananeira no...
Tipo: Sistema de Produção (INFOTECA-E) Palavras-chave: Importância econômica; Exigência Climática; Trato cultural; Manejo de plantas infestantes; Vale do São Francisco; Banana irrigada; Banana; Solo; Adubação; Muda; Plantio; Irrigação; Colheita; Doença de planta; Variedade; Soil; Fertilizer application; Cultivars; Plantations; Irrigation; Plant cultural practices; Harvesters.
Ano: 2014 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133189
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Effects of habitat and landscape characteristics on medium and large mammal species richness and composition in northern Uruguay Rev. Bras. Zool.
Andrade-Núñez,María José; Aide,T. Mitchell.
The increasing world population and demand for food and other products has accelerated the conversion of natural habitats into agricultural lands, plantations and urban areas. Changes in habitat and landscape characteristics due to land-use change can have a significant effect on species presence, abundance, and distribution. Multi-scale approaches have been used to determine the proper spatial scales at which species and communities are responding to habitat transformation. In this context, we evaluated medium and large mammal species richness and composition in gallery forest (n = 10), grassland (n = 10), and exotic tree plantation (n = 10) in a region where grasslands have been converted into exotic tree plantations. We quantified mammal species...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conservation; Community; Gallery forest; Grassland; Plantations.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600012
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La politique des plantations dans le cercle d'Anecho au temps colonial Allemand 1884-1914 OceanDocs
Ahadji, A.Y..
La question des plantations en Afrique au XIXè siècle s'insère dans le grand cadre de l'histoire universelle. Ce cadre était déterminé par les nouvelles exigences du marché mondial, notamment des pays industialisés d'Europe occidentale et des Etats Unis d'Amerique. Les paysans africains s'étaient mis à produire pour ce marché mondial. Ils fournissaient pas un véritable travail de plantation, mais plutôt d'entretien. Certains produits comme le caoutchouc, recueilli à partier des .. sauvages, étaient uniquement destinés à l'exportation, tandis que le maïs, le copra, le coton, et l'arachide ...
Tipo: Book Section Palavras-chave: Plantations; History; Http://aims.fao.org/aos/agrovoc/c_5990; Http://aims.fao.org/aos/agrovoc/c_3635.
Ano: 2001 URL: http://hdl.handle.net/1834/1183
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Peasants and plantations in the Sri Lankan tea sector: causes of the change in their relative viability AgEcon
Herath, Deepananda P.B.; Weersink, Alfons.
In contrast to the increasing trend in farm size found in most agricultural sectors, the absolute number of producers and relative share of total production from small farms growing green leaf tea in Sri Lanka have increased significantly over time. The boom in peasant production and the corresponding decline in plantations are due to the same general drivers explaining the increase in farm size elsewhere. Government programs and price effects that reduced revenue uncertainty and relative costs of production have enhanced the competitive position of small farmers relative to large estates.
Tipo: Journal Article Palavras-chave: Farm size distribution; Farm structure; Peasants; Plantations; Sri Lanka; Tea industry; Crop Production/Industries.
Ano: 2007 URL: http://purl.umn.edu/118319
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The Forest Sector: Important Innovations AgEcon
Sedjo, Roger A..
Unlike other resources such as petroleum, coal, and copper, forests are renewable. Yet, in many respects forests historically have been treated as a nonrenewable resource in that forest stocks were depleted or "mined" and loggers moved on to exploit other "deposits." The lands were often put to other uses, typically agricultural, or allowed to regenerate naturally. This paper looks at technical change in forest extraction, i.e., logging under a number of different conditions. It finds that, on average, labor productivity has been increasing in recent decades. However, total factor productivity in the US has declined in recent years. In addition, the study examines the tree-growing potential of plantation forestry. It finds that there is underway a...
Tipo: Working or Discussion Paper Palavras-chave: Productivity; Resources; Forests; Timber; Technology; Innovations; Plantations; Logging; Genetics; Extraction; Resource /Energy Economics and Policy; O31; O32; O50; O51; Q23.
Ano: 1997 URL: http://purl.umn.edu/10667
Registros recuperados: 7
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