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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

SPATIAL VARIABILITY OF PHYSICAL ATTRIBUTES OF AN ALFISOL UNDER DIFFERENT HILLSLOPE CURVATURES

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Author(s):
Camargo, Livia Arantes [1] ; Marques Junior, Jose [2] ; Pereira, Gener Tadeu [3]
Total Authors: 3
Affiliation:
[1] UNESP Jaboticabal, Agron Postgrad Program Vegetal Prod, BR-14870900 Jaboticabal, SP - Brazil
[2] UNESP Jaboticabal, Soil & Fertilizer Dept, BR-14870900 Jaboticabal, SP - Brazil
[3] UNESP Jaboticabal, Exact Sci Dept, BR-14870900 Jaboticabal, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Revista Brasileira de Ciência do Solo; v. 34, n. 3, p. 617-630, MAY-JUN 2010.
Web of Science Citations: 24
Abstract

The influence of relief forms has been studied by several authors and explains the variability in the soil attributes of a landscape. Soil physical attributes depend on relief forms, and their assessment is important in mechanized agricultural systems, such as of sugarcane. This study aimed to characterize the spatial variability in the physical soil attributes and their relationship to the hillslope curvatures in an Alfisol developed from sandstone and growing sugarcane. Grids of 100 x 100 m were delimited in a convex and a concave area. The grids had a regular spacing of 10 x 10 m, and the crossing points of this spacing determined a total of 121 georeferenced sampling points. Samples were collected to determine the physical attributes related to soil aggregates, porosity, bulk density, resistance to penetration and moisture within the 0-0.2 and 0.2-0.4 m depth. Statistical analyses, geostatistics and Student's t-tests were performed with the means of the areas. All attributes, except aggregates > 2 mm in the 0-0.2 m depth and macroporosity at both depths, showed significant differences between the hillslope curvatures. The convex area showed the highest values of the mean weighted diameter, mean geometric diameter, aggregates > 2 mm, 1-2 mm aggregates, total porosity and moisture and lower values of bulk density and resistance to penetration in both depth compared to the concave area. The number of soil attributes with greater spatial variability was higher in the concave area. (AU)

FAPESP's process: 06/05573-5 - Spatial variability of mineralogical physical attributes of an argisol in different relief forms under sugarcane cultivation
Grantee:Livia Arantes Camargo
Support type: Scholarships in Brazil - Master