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| Registros recuperados: 52 | |
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| Tormena,Cássio Antonio; Fidalski,Jonez; Rossi Junior,Waldemar. |
| Diferentes propriedades físicas têm sido utilizadas para avaliar a qualidade física do solo. Nesse contexto, a resistência tênsil e a friabilidade são indicadores da qualidade estrutural e física de um solo. O objetivo deste estudo foi quantificar a resistência tênsil e a friabilidade de um Latossolo Vermelho distrófico em diferentes sistemas de uso: floresta nativa, pousio e cultivado. A amostragem de solo foi realizada em 2006, na Fazenda Experimental da Universidade Estadual de Maringá, Estado do Paraná, em três áreas contíguas sob mata nativa, pousio e cultivo de culturas anuais. A amostragem de solo consistiu da coleta de 10 blocos de solo (15 x 20 x 10 cm) na profundidade de 0-15 cm. Em cada sistema de uso do solo, determinou-se a resistência tênsil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbono orgânico; Densidade do solo; Manejo do solo; Qualidade do solo. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000100004 |
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| Ferreira,Camila Jorge Bernabé; Tormena,Cássio Antonio; Moreira,Wagner Henrique; Zotarelli,Lincoln; Betioli Junior,Edner; Anghinoni,Guilherme. |
| ABSTRACT Understanding the spatial behavior of soil physical properties under no-tillage system (NT) is required for the adoption and maintenance of a sustainable soil management system. The aims of this study were to quantify soil bulk density (BD), porosity in the soil macropore domain (PORp) and in the soil matrix domain (PORm), air capacity in the soil matrix (ACm), field capacity (FC), and soil water storage capacity (FC/TP) in the row (R), interrow (IR), and intermediate position between R and IR (designated IP) in the 0.0-0.10 and 0.10-0.20 m soil layers under NT; and to verify if these soil properties have systematic variation in sampling positions related to rows and interrows of corn. Soil sampling was carried out in transect perpendicular to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crop row; Crop interrow; Spectral analysis. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100511 |
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| Ferreira,Camila Jorge Bernabé; Tormena,Cássio Antonio; Cecato,Ulysses; Franco,Hélio Henrique Soares; Moreira,Wagner Henrique; Galbeiro,Sandra; Ribeiro,Ossival Lolato. |
| Abstract: The objective of this work was to evaluate the physical properties of a soil with a 'Tanzânia' grass (Megathyrsus maximus) pasture fertilized with mineral nitrogen or intercropped with the legume 'Campo Grande' (Stylosanthes spp.), and subjected to continuous grazing and variable stocking rate, in a three-year chronosequence. The treatments were: 'Tanzânia' grass and Stylosanthes; and 'Tanzânia' grass fertilized with 75, 150, and 225 kg ha-1 N per year. The experiment was carried out in an Oxisol, in a randomized complete block design with three replicates, in split plots divided according to time (first, second, and third experimental years). The following soil properties were assessed annually: soil bulk density, porosity in the soil macropore... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Panicum maximum; Stylosanthes; Soil penetration resistance; Stocking rate. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000400478 |
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| Schaffrath,Valter Roberto; Gonçalves,Antônio Carlos Andrade; Sousa,António Jorge; Tormena,Cássio Antonio. |
| The spatial correlation between soil properties and weeds is relevant in agronomic and environmental terms. The analysis of this correlation is crucial for the interpretation of its meaning, for influencing factors such as dispersal mechanisms, seed production and survival, and the range of influence of soil management techniques. This study aimed to evaluate the spatial correlation between the physical properties of soil and weeds in no-tillage (NT) and conventional tillage (CT) systems. The following physical properties of soil and weeds were analyzed: soil bulk density, macroporosity, microporosity, total porosity, aeration capacity of soil matrix, soil water content at field capacity, weed shoot biomass, weed density, Commelina benghalensis density,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cross-variogram; Co-kriging; Physical and biological meanings. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100279 |
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| Gonçalves,Antonio Carlos Andrade; Trintinalha,Marcos Antonio; Folegatti,Marcos Vinicius; Rezende,Roberto; Tormena,Cássio Antonio. |
| Irrigated agricultural fields usually show variable crop water demand. If water application is done to match this spatially variable demand, the water use efficiency can be substantially improved. Soil water management by irrigation has been one of the most important factors to increase crop yield. To look for the economic viability of the process, the use of several inputs, particularly water, should be done with high efficiency levels. Historically, irrigation uniformity has been evaluated above the soil surface, in which applied water was the only factor to be taken into account. However, the crop will respond to soil water content uniformity, which can differ from the uniformity of water application. To evaluate temporal stability of spatial pattern of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigation; Geostatistics; Soil water uniformity; TDR. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000500016 |
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| Guimarães,Rachel Muylaert Locks; Tormena,Cássio Antonio; Alves,Sérgio José; Fidalski,Jonez; Blainski,Éverton. |
| The crop-livestock system can promote soil compaction in surface layers, mainly due to animal trampling. However, plants and their root growth, in interaction with animal trampling, can decrease the deleterious changes in soil structure caused by this system. Up to the present time, the physical soil modifications in crop-livestock systems, including oat and ryegrass crops for winter animal forages are unknown. The objective of this study was to quantify and to relate tensile strength, friability and soil organic carbon in an Oxisol under a crop-livestock system. The study was conducted in Campo Mourão - Paraná, Brazil. Four forage heights were used for the winter forages: 7, 14, 21 and 28 cm. For each forage height, five soil blocks were randomly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aggregate; Soil structure; No-tillage; Soil physical quality; Microstructure. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400011 |
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| Fidalski,Jonez; Tormena,Cássio Antonio; Gonçalves,Antonio Carlos Andrade; Oliveira Júnior,Rubem Silvério. |
| A compactação e a qualidade do solo são constantemente questionadas para a definição do manejo de solo em plantio direto. Os objetivos deste estudo foram avaliar a variabilidade espacial da resistência do solo à penetração, da densidade do solo e a taxa de estratificação de carbono orgânico do solo em camadas de um Latossolo Vermelho eutroférrico, textura muito argilosa, em áreas contíguas de plantio direto com rotação de culturas e plantio direto com sucessão de culturas associado à escarificação. O estudo foi realizado de maio a junho de 2002, no município de Palotina, região Oeste do Paraná. As amostras para determinação da densidade do solo, da resistência do solo à penetração e do teor de carbono orgânico do solo foram obtidas em 120 pontos, em uma... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geoestatística; Plantio direto; Densidade do solo; Compactação; Escarificação; Qualidade do solo. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782006000600016 |
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| Registros recuperados: 52 | |
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