Artículo
Quantification of the soil physical quality of a tropical oxisol using the s index
Fecha de publicación:
01/2008
Editorial:
Universidade de São Paulo
Revista:
Scientia Agricola
ISSN:
0103-9016
e-ISSN:
1678-992X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
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 > 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 < SCT 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.
Palabras clave:
BULK DENSITY
,
NO-TILLAGE
,
SOIL STRUCTURE
,
SOIL WATER RETENTION
,
TROPICAL SOILS
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Articulos(IAL)
Articulos de INSTITUTO DE AGROBIOTECNOLOGIA DEL LITORAL
Articulos de INSTITUTO DE AGROBIOTECNOLOGIA DEL LITORAL
Citación
Tormena, Cássio Antonio; Da Silva, Álvaro Pires; Imhoff, Silvia del Carmen; Dexter, Anthony Roger; Quantification of the soil physical quality of a tropical oxisol using the s index; Universidade de São Paulo; Scientia Agricola; 65; 1; 1-2008; 56-60
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