Low Weathered Soils
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Mineralogical and chemical attributes of soils from the Brazilian Atlantic Forest domain
ABSTRACT: The Atlantic Forest is one of the most important and yet the most devastated Brazilian biome, occupying in the past the majority of the East Atlantic Coast. Therefore, a detailed knowledge of the soils near the coastal line influenced by this biome is essential for land use and management of these environments. The aim of this study was to acquire
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-02
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2. Mineralogy, Micromorphology, and Genesis of Soils with Varying Drainage Along a Hillslope on Granitic Rocks of the Atlantic Forest Biome, Brazil
ABSTRACT Although the physical environment of the Atlantic Forest realm is well known, studies on the soil-landform relationships are fundamental to improve the management of soil resources to facilitate sustainable development. The purpose of this study was to evaluate a representative topossequence on the “Mares de Morros” landscape of deeply weathered
Rev. Bras. Ciênc. Solo. Publicado em: 16/07/2018
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3. Geochemical Signature of Amazon Tropical Rainforest Soils
ABSTRACT: Evaluating soil geochemical diversity in the Amazon Basin has been a challenge largely because most study sites have been at the edge of the basin and it is difficult to get samples in such a region. Here we show that even among the most weathered soils, physicochemical soil properties express lithology. Our results are based on topsoil samples col
Rev. Bras. Ciênc. Solo. Publicado em: 15/02/2018
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4. Minjingu phosphate rock availability in low-pH highly weathered soil as affected by added salts
Concentrations and identity of ions in the soil solution may affect soil phosphorus (P) reactions and P availability. In this study, the magnitude of these reactions was evaluated following the application of Minjingu phosphate rock (MPR) combined with chloride and carbonate salts of Na and Ca within an incubation experiment. Twenty-one days later NaOH-P and
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-10
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5. Efficiency in the use of phosphorus by common bean genotypes
Common bean (Phaseolus vulgaris L.) is frequently grown in weathered soils with low phosphorus (P) availability, and this is one of the main limitations on its production. This study aimed to assess 20 common bean genotypes in a hydroponic system to select the best P concentration for inducing nutritional deficiency and to classify the genotypes in terms of
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-06
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6. DINÂMICA DO FÓSFORO NA INTEGRAÇÃO LAVOURA-PECUÁRIA SOB SISTEMA PLANTIO DIRETO / Phosphurus dynamic in crop livestock integration under notillage.
The necessity to preserve the soil, coupled with the constant search for lower production costs and increased productivity resulted in the use no-tillage (NT). Efficient technique in the preservation and use of highly weathered soils (tropical and subtropical soils). However, only the continuous cultivation of monocultures has been implicated in reduced prof
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/11/2011
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7. Distribution of soil organic carbon fractions in old-growth forests in the Amazon Basin: the role of soil properties, leaf litter quality and climate / Distribuição das frações do carbono orgânico nos solos de florestas maduras na Bacia Amazônica: o papel das propriedades do solo, da qualidade da liteira e do clima
Soil organic carbon (SOC) stability is a function of environmental and biological conditions such as edaphic factors, climate and organic matter quality. Considering that a wide variation occurs in all these parameters across Amazonia, one could expect that there should be systematic variations in SOC fractions across the area. Understand the processes invol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2011
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8. Potassium doses and frequency of application to alfalfa in tropical soil.
Providing an adequate supply of nutrients is important for alfalfa production and is essential to maintain high quality and profitable yields. Potassium fertilization is essential for alfalfa production (Rassini and Freitas, 1998) and is the most common nutrient input for this crop in the high weathered, low-fertile and acids soils of tropical regions. High-
INTERNATIONAL PLANT NUTRITION COLLOQUIUM. Publicado em: 2011
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9. CARACTERIZAÇÃO E QUANTIFICAÇÃO MINERALÓGICA DA FRAÇÃO ARGILA DO HORIZONTE Bi DE CAMBISSOLOS DA REGIÃO DE IRATI, PARANÁ, PELO MÉTODO DE RIETVELD
Para fazer uso dos benefícios decorrentes do desenvolvimento da agricultura é necessário conhecer propriedades físicas e químicas do solo que possibilitem a reposição de nutrientes por adubação mineral e orgânica de forma correta. Estas propriedades do solo variam em grande parte de acordo com o teor e composição dos minerais da fração argila.
Publicado em: 2010
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10. Pedological characterization of Brazilian archaeo-anthroposols: sambaquis from the lakes region (RJ) and indian dark earths from the low Negro/Solimões river region (AM) / Caracterização pedológica de arqueo-antropossolos no Brasil: sambaquis da Região dos Lagos (RJ) e terras pretas de índio na região do baixo rio Negro/Solimões (AM)
This work surveyed some anthropogenic soils, the so-called Archaeo-Anthroposols. Those soils show advanced degree of pedogenesis, displaying tokens of their anthropic origin such as chemical and mineralogical characters and soil micromorphology. Some pottery shards are also constantly found in places where pottery making peoples dwelt, as well as shells and
Publicado em: 2007
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11. Influence of vegetation cover on nutrient cycling in soil solution at the area of Manaus AM. / Influência da cobertura vegetal na ciclagem de nutrientes via solução do solo na região de Manaus - AM.
The main objective of this study was to contribute for the sustainability of land use in the central Amazon, evaluating the influence of vegetation cover on nutrient concentrations in soil solution that is, on the amounts of cations, anions and dissolved organic carbon (DOC). Using a primary forest as reference, we compared these concentrations with those in
Publicado em: 2005
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12. 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