|
|
|
|
| |
|
| |
|
| |
|
|
| Sousa Neto,Eurico Lucas de; Figueiredo,Luiz Henrique Arimura; Beutler,Amauri Nélson. |
| Uma das condições essenciais para a realização da análise textural é a individualização completa das partículas minerais da amostra de solo. Este estudo teve por objetivo avaliar a eficiência de métodos químicos e físicos combinados na dispersão de um Latossolo Vermelho irrigado com água de poço tubular no município de Janaúba - MG (16 º 01 ' 56 '' S e 43 º 25 ' 21 '' W). Foram coletadas amostras de solo na camada de 0-0,10 m em um bananal irrigado e em área adjacente sob mata nativa para determinação da análise textural. Os tratamentos constituíram-se de cinco dispersantes químicos (NaOH 0,1 mol L-1, NaOH 1 mol L-1, calgon 0,1 mol L-1, HCl 0,1 mol L-1 + NaOH 0,1 mol L-1e HCl 1 mol L-1 + NaOH 1 mol L-1) e dois dispersantes físicos (agitação com 50... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Análise textural; Dispersão; Pseudo silte. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000300024 |
| |
|
|
| Sousa Neto,Eurico Lucas de; Pierangeli,Maria Aparecida Pereira; Lal,Rattan. |
| Compaction is an important problem in soils under pastoral land use, and can make livestock systems unsustainable. The objective of this research was to study the impact of soil compaction on yield and quality of palisade (UROCHLOA BRIZANTHA cv. Marandu). The experiment was conducted on an Oxisol in the State of Mato Grosso, Brazil. Treatments consisted of four levels of soil compaction: no compaction (NC), slight compaction (SC), medium compaction (MC) and high compaction (HC). The following soil properties were evaluated (layers 0-0.05 and 0.05-0.10 m): aggregate size distribution, bulk density (BD), macroporosity, microporosity, total porosity (TP), relative compaction (RC), and the characteristics of crude protein (CP), neutral detergent fiber (NDF),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crude protein; Relative compaction; Urochloa. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400010 |
| |
|
|
| Beutler,Amauri Nelson; Centurion,José Frederico; Centurion,Maria Aparecida Pessoa da Cruz; Freddi,Onã da Silva; Sousa Neto,Eurico Lucas de; Leonel,Cristian Luarte; Silva,Álvaro Pires da. |
| Excessive traffic on the soil may affect soybean development. This research was carried out to evaluate soybean root development and grain yield under compacted soil, in an Oxisol. The following traffic treatments were used: T0 = no traffic; T1* = 1 passage of a 4 t tractor; and, T1, T2, T4 and T6, respectively for 1, 2, 4 and 6 passages of an 11 t tractor on the same location, each besides the other. After compaction, soybean [Glycine max cv. MG/BR 46 (Conquista)] was cultivated. The experiment was arranged in a completely randomized design, with six compaction levels and four replicates (plots of 9.0 m²). Undisturbed soil samples were collected in the layers 0.03-0.06, 0.08-0.11, 0.15-0.18 and 0.22-0.25 m, for physical analyses. Root analyses were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Machine traffic; Bulk density; Penetration resistance. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000600008 |
| |
|
|
|
