269 resultados para Terra preta
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This study was developed with the aim of evaluating the performance and land use efficiency of different arrangements of intercropping with maize and forage. The field experiment was conducted in Tangar da Serra/MT. The experimental design was a randomized block in factorial scheme 3x2 + 1, were as three arrangements of intercropping, two species of forage and an additional treatment with maize monoculture in four replication. In maize monoculture and intercropping were evaluated: plant height and ear insertion height, plant population, weight of 100 grains, productivity, number of grain rows and number of grain per row. In forages intercropping with maize were evaluated plant population and dry matter accumulation. The arrangements with Maize + Forage sown in the line and Maize + Forage sown in two rows between rows with the species Urochloa hybrid promoted best corn yields. The modality and species affect both the productivity of maize as forages species. Grain yield of maize is higher in monoculture. The higher dry matter accumulation of Urochloa hybrid occurs in the Maize + Forage sown in one row between rows, while, for the Urochloa brizantha the arrangements studied do not affect their yields. The arrangement with best land use efficiency is Maize + Forage sown in two rows between rows for both study forage species.
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All trees with diameter at breast height dbh >= 10.0 cm were stem-mapped in a "terra firme" tropical rainforest in the Brazilian Amazon, at the EMBRAPA Experimental Site, Manaus, Brazil. Specifically, the relationships of tree species with soil properties were determined by using canonical correspondence analyses based on nine soil variables and 68 tree species. From the canonical correspondence analyses, the species were grouped into two groups: one where species occur mainly in sandy sites, presenting low organic matter content; and another one where species occur mainly in dry and clayey sites. Hence, we used Ripley's K function to analyze the distribution of species in 32 plots ranging from 2,500 m(2) to 20,000 m(2) to determine whether each group presents some spatial aggregation as a soil variations result. Significant spatial aggregation for the two groups was found only at over 10,000 m(2) sampling units, particularly for those species found in clayey soils and drier environments, where the sampling units investigated seemed to meet the species requirements. Soil variables, mediated by topographic positions had influenced species spatial aggregation, mainly in an intermediate to large distances varied range (>= 20 m). Based on our findings, we conclude that environmental heterogeneity and 10,000 m(2) minimum sample unit sizes should be considered in forest dynamic studies in order to understand the spatial processes structuring the "terra firme" tropical rainforest in Brazilian Amazon.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Pós-graduação em Agronomia (Irrigação e Drenagem) - FCA
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Pós-graduação em Educação - FCT
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Pós-graduação em Geografia - IGCE
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Pós-graduação em Ciências Biológicas (Biologia Celular e Molecular) - IBRC
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Several groups reveal their interests, their critical position on reality through structure alternative of communication ways for great media. These ways, that were present during history of brazilian journalism don´t have the repercussion and reach of great communication enterprises, but they are initiatives that collaborate to spread of perspectives about the reality and on structure of a communication more democratic. This analysis organizes itself from observation about the newspaper Sem Terra emphasizing their principal characteristics, their speech about the conception of citizenship related to agrarian reform project and its significance about journalism of great media. The militant journalism just emerges like one of the tools on struggles of citizenship, but fundamental importance to spread the reality readings and to allow reflexions about the admitted journalistic language through arrival of modernity.
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Bauru: region of cerrado ou forest? The city of Bauru is located in São Paulo State, where the maps showing native vegetation distribution does not clearly defi ne its nature. In order to clarify which types of native vegetation was found in this region, a bibliographic survey was performed, ranging from ancient documents prepared by naturalists describing this region and recent research results of floristic and phytosociological character. It is concluded that in Bauru, semideciduous seasonal forests overlays the northwestern and that cerrado comes over the southeast region. In riparian areas where the cerrado prevailed, there are still traces of swamp forests and swamp grasslands. In the border areas between forests and cerrado, the occurrence of vegetation transition is common, with two distinct types of it and other typical of these ecotone zones.
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This article developed some thoughts on the model of education and elementary education school located in camps and settlements in the Landless Movement (MST), between the last decade of the twentieth century and the beginning of the first decade of this century. The discussions were conducted employing as reference some texts published in the Caderno de Educação nº. 13, named “Dossiê MST Escola” Through a synthesized analysis of these documents, we found that the MST argues for a theoretical and practical education, geared towards the reality of d student, which is based on humanistic principles and of cooperation, being able to create in the student landless movement a critical consciousness capable of make it a subject of transformative action.
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Pós-graduação em Ciência Florestal - FCA
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Pós-graduação em Engenharia Civil - FEIS
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)