Data/hora: 11/06/2024 05:36:25

Provedor de dados: | 63
País: | Brazil
Título: | Quantification of the soil physical quality of a tropical oxisol using the S index
Autores: | Tormena,Cássio Antonio; Silva,Álvaro Pires da; Imhoff,Silvia Del Carmen; Dexter,Anthony Roger.
Data: | 2008-02-01
Ano: | 2008
Palavras-chave: | Bulk density; Tropical soils; No-tillage; Soil water retention; Soil structure.
Resumo: | Soil physical quality is fundamental for the sustainability of agro ecosystems. Soil physical quality assessment must be developed using parameters that describe physical behavior. S, a new soil physical parameter has recently been introduced for assessing the soil physical quality. A good soil physical quality has been associated with values of S &gt; 0.035 in soils from temperate climates. However, S has not been evaluated in tropical soils yet. Therefore we tested the hypothesis that S is a reliable soil physical quality indicator of a Typic Hapludox cropped with maize under no-tillage (NT) and conventional tillage (CT). Undisturbed samples were collected from each tillage system in the row and interrow positions. Soil bulk density was determined in the samples and the S parameter was calculated using a pedotransfer function from the same samples. The parameter S was able to differentiate tillage and position with S NT &lt; S CT independent of the row and interrow sampling positions. Higher S values were verified in row position than in the interrow in both tillage systems. With the use of a pedotransfer function it was also possible to establish a negative relationship between S and soil compaction. The results confirmed our hypothesis and suggest that further studies should be carried out to evaluate S in other tropical soils and management systems.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000100008
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162008000100008
Formato: | text/html
Fonte: | Scientia Agricola  v.65 n.1 2008
Fonte: | info:eu-repo/semantics/openAccess