Soils Of Acre
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. New rhizobia strains isolated from the Amazon region fix atmospheric nitrogen in symbiosis with cowpea and increase its yield
ABSTRACT Studies in the Amazon indicate a wide diversity of rhizobia with the ability for biological nitrogen fixation (BNF), which could expand the number of strains approved for cowpea. Thus, the aim of this field study was to evaluate the agronomic performance in cowpea of the several strains isolated from the soils of the Brazilian states Acre and Rondô
Bragantia. Publicado em: 11/02/2019
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2. Chemical Species and Aluminum Concentration in the Solution of Acid Soils Cultivated with Soybean and Corn under Liming
ABSTRACT Chemical speciation of the soil solution is an important tool to identify Al species related to phytotoxicity. In some Brazilian acid soils, the Al extractable by the KCl 1.0 mol L -1 solution (Al-KCl) exceeds 10 cmol c kg -1 and even then, in some situations, it does not cause toxicity to the plants. This study aimed to evaluate the relationship be
Rev. Bras. Ciênc. Solo. Publicado em: 18/10/2018
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3. Nutrientes (K, P, Ca, Na, Mg e Fe) em sedimentos (solos aluviais) e cultivares (feijão e milho) de praias e barrancos de rios de água branca: a bacia do purus no estado do Acre, Brasil
The present research highlights the macronutrient abundance in the sediments of beaches and cliffs and cultivates in the river Purus and flowing, southwest of Amazon. The concentrations found in leaves and bean seeds and corn leaves reflect the mineralogical and chemical nature of those rich sediments in K2O and Na2O, which are formed by smectite, illite and
Química Nova. Publicado em: 2009
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4. DESENVOLVIMENTO INICIAL DE SANGUE-DE-DRAGÃO (Croton lechleri MÜLL. ARG.) SOB DIFERENTES CLASSES DE SOLOS, CORRETIVOS E NÍVEIS DE LUMINOSIDADE NA AMAZÔNIA CENTRAL / DESENVOLVIMENTO INICIAL DE SANGUE-DE-DRAGÃO (Croton lechleri MÜLL. ARG.) SOB DIFERENTES CLASSES DE SOLOS, CORRETIVOS E NÍVEIS DE LUMINOSIDADE NA AMAZÔNIA CENTRAL
The specie dragons blood (Croton lechleri) having been calling international attention due the presence of an alkaloid in its latex called taspine known for its antinflammatory, antibiotic and cicatrizing properties, being largely used in the healing of gastric ulcers, diarrhea and different types of viruses. The latex indiscriminated extraction from native
Publicado em: 2009
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5. Influence of land usage changes in soil properties in an ecosystem of the Amazon south occidental. / Influência da mudança no uso do solo nas propriedades edáficas em ecossistema da Amazônia Sul Ocidental.
The inadequate land management causes soil degradation, which, if reversible, will require time and resources for recovering. Evaluations of changes in soil properties using soil quality indicators contribute to avoid soils more susceptible to decrease their natural productive capacity. The aim of this study was to verify the influence of changes in land usa
Publicado em: 2009
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6. Soil quality in native forest and pasture eco-systems in the eastern Acre region of Western Amazon / Qualidade do solo em ecossistemas de mata nativa e pastagens na região leste do Acre, Amazônia Ocidental
The state of Acre is presently at the initial stage of converting its forests into pastures. Around 12% of its total area (19.200 km2) has been deforested. Out of this, approximately 81% (13.352 km2) have been utilized by several productive segments in Acre (farmers, land settlers, extractivists, riverine farmers and cattle producers), with extensive pasture
Publicado em: 2008
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7. Geoambientes, pedogênese e uso da terra no setor norte do Parque Nacional da Serra do Divisor, Acre / Geo-environments, pedogenesis and land use in north sector of the National Park of Serra do Divisor
The Serra do Divisor National Park , in the Upper Jurua River, west of the State of Acre, with 784.077 hectares, is covered by primary forest vegetation, with high biodiversity. In this study, we caracterized and mapped the geoenvironmental units and the land use of the northern sector of the Park (319.373 ha), and we also studied the pedogenetics aspects of
Publicado em: 2007
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8. Estratificação de ambientes para gestão ambiental e transferência de conhecimento, no Estado do Acre, Amazônia Ocidental / Stratification of environments for environmental management and the transfer of the knowledge in the State of Acre, Western Amazonia
Para a realização deste estudo no Estado do Acre-Amazônia Ocidental foram utilizados três níveis de abordagem: estadual, municipal e local (pólo agroflorestal). O objetivo foi desenvolver e adequar à prática de avaliação e planejamento de uso da terra, tendo o solo, como elemento de síntese dos recursos naturais, de forma que associado com o conhe
Publicado em: 2007
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9. Agricultura urbana na cidade de Rio Branco, Acre: caracterização, espacialização e subsídios ao planejamento urbano / Urban agriculture in the city of Rio Branco, Acre: characterization,espacialization and subsidies to the urban planning
A rápida urbanização dos países subdesenvolvidos e o êxodo campocidade aumentaram a necessidade das cidades de prover emprego e condições de vida adequadas à crescente população. A agricultura urbana e periurbana (AUP) mostra-se como uma atividade viável para a melhoria da qualidade de vida das populações urbanas, principalmente das camadas mais
Publicado em: 2006
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10. Evaluation of the stock and isotopic composition of carbon in the soil of Acre. / Avaliação do estoque e composição isotópica do carbono do solo no Acre.
The State of Acre is located in the extreme west of Brazil, occupying an area that had great geological influence from the mountain chain of Andes. The soils present pedologic characteristics very different from the ones found in the remaining of Brazilian Amazon, prevailing Inceptisols, Alfisols, and Ultisols, generally eutrophic, young and little weathered
Publicado em: 2004
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11. Caracterização ambiental da reserva extrativista Chico Mendes (Acre-Brasil): subsídios ao plano de manejo.
The main objective of this work was the environmental characterization of Reserva Extrativista Chico Mendes, a Protected Area located in the state of Acre, Brazil. This analysis had a view to achieving a general diagnosis of the reserve environmental situation in the face of patterns of land and resource utilization and to providing an ecological basis for t
Publicado em: 2000