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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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| Franco,Hélio Henrique Soares; Silva,Alvaro Pires da; Tormena,Cássio Antonio; Ferreira,Camila Jorge Bernabé; Nunes,Márcio Renato; Lima,Renato Paiva de; Libardi,Paulo Leonel. |
| Abstract: The objective of this work was to determine the measurement accuracy of the soil water matric potential (ψm) by puncture tensiometers with either rounded or pointed porous cups, installed with or without “soil mud”, and to compare the performance of these tensiometers with that of tensiometers equipped with mercury manometers. The experiment was conducted in a Ultisol, in a randomized complete block design, in a factorial arrangement with five replicates. Puncture tensiometers with rounded porous cups, installed with “soil mud”, present more elevated accuracy for ψm determination in a wider measurement range, resembling tensiometers equipped with mercury manometers in drying soil. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Puncture tensiometers; Rounded porous cup; Soil mud. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201291 |
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| Betioli Júnior,Edner; Moreira,Wagner Henrique; Tormena,Cássio Antônio; Ferreira,Camila Jorge Bernabé; Silva,Álvaro Pires da; Giarola,Neyde Fabíola Balarezo. |
| A qualidade física do solo é um dos fatores determinantes da sustentabilidade agronômica, econômica e ambiental no sistema plantio direto (SPD). A compactação do solo tem sido apontada como um dos fatores de redução da qualidade física em solos sob SPD. Contudo, com a utilização do SPD, pode haver o incremento de matéria orgânica do solo e o desenvolvimento de um sistema poroso contínuo e estável, que atenuam os impactos negativos da compactação. O objetivo deste trabalho foi avaliar a qualidade física de um Latossolo Vermelho distroférrico sob SPD durante 30 anos, utilizando o intervalo hídrico ótimo (IHO) e o grau de compactação do solo (GC). Em uma área comercial com histórico de altas produtividades sob SPD, foram coletadas amostras de solo com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Qualidade física do solo; Densidade do solo; Estrutura do solo; Resistência do solo à penetração. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000300027 |
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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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