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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.)

Detailed mapping unit design based on soil-landscape relation and spatial variability of magnetic susceptibility and soil color

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Author(s):
Siqueira, D. S. [1] ; Marques, Jr., J. [1] ; Pereira, G. T. [2] ; Teixeira, D. B. [1] ; Vasconcelos, V. [3] ; Carvalho Junior, O. A. [3] ; Martins, E. S. [4]
Total Authors: 7
Affiliation:
[1] State Univ Sao Paulo UNESP, Dept Soils & Fertilizers, Res Grp CSME Soil Characterizat Specif Management, Sao Paulo - Brazil
[2] State Univ Sao Paulo UNESP, Dept Exact Sci, Res Grp CSME Soil Characterizat Specif Management, Sao Paulo - Brazil
[3] Univ Brasilia UNB, LSIE Lab Spatial Informat Syst, Dept Geog, Brasilia, DE - Brazil
[4] Embrapa Cerrados, Brasilia, DF - Brazil
Total Affiliations: 4
Document type: Journal article
Source: CATENA; v. 135, p. 149-162, DEC 2015.
Web of Science Citations: 11
Abstract

The objective was to identify landscape areas with different patterns of variability using a statistic protocol with data of magnetic susceptibility (MS) and soil color that are covariate attributes of soil formation factors and processes. The studied area, of 380 ha, is located in Northeast of Sao Paulo State, Brazil. An amount of 86 samples was collected using 30 m intervals on the transect. At the transect sides, 150 samples were collected at 159 m intervals (a point each 2.5 ha). First the accuracy limits have been validated in the transect using the technique of Split Moving Windows - SMW. The limits identified in the transect were extrapolated to the sides using the contours of variability maps. The MS peaks SMW, for both depths, presented a correlation with the peaks of clay content (r = 0.7; P < 0.01), hue (varying from 0:37; P < 0.05 to 0.61; P < 0.01) and Normalized Difference Vegetation Index-NDVI (varying from - 0.25 to - 0.35, P < 0.05). The errors of the MS spatial variability maps (6.22-11.85%) were similar to the clay content ones (6:22 to 14:16%). MS was more efficient in the compartmentalization of the landscape (identification of areas with different patterns of variability) than the hue determined by diffuse reflectance spectroscopy in Oxisols under the transition Basalt and Colluvial-Elluvial-Alluvial Deposits. The results of this study can lead to using an alternative strategy that is a mapping of soil attributes and identification of areas with different patterns of pedogenic iron oxide variability. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/06053-3 - MAGNETIC SUSCEPTIBILITY AND REFLECTANCE SPECTROSCOPY DIFFUSE IN IDENTIFICATION OF AREAS OF MANAGEMENT FOR SPECIFIC SUGAR CANE
Grantee:Diego Silva Siqueira
Support Opportunities: Scholarships in Brazil - Doctorate