Title:	Spatial analysis of soil physical attributes from a degraded area under different types of management.
Authors:	CARVALHO, J. C. B. de ESPINDOLA, C. R. ALVES, M. C. GREGO, C. R. VIEIRA, S. R.
Affiliation:	JOSEANE CARINA BORGES DE CARVALHO, Secretaria da Educação do Estado de São Paulo; CARLOS ROBERTO ESPINDOLA, IG/Unicamp; MARLENE CRISTINA ALVES, Unesp; CELIA REGINA GREGO, CNPTIA; SIDNEY ROSA VIEIRA.
Date Issued:	2017
Citation:	African Journal of Environmental Science and Technology, v. 11, n. 9, p. 486-498, Sept. 2017.
Description:	The objective of this work was to analyze the spatial variability of soil aggregates, porosity and density under five different land-uses and management conditions (degraded substrate - SD; degraded substrate with sewage sludge and Eucalyptus crop - SDLE; soil under pasture SP; capoeira under regeneration - SR; and soil under cerrado - SC). Total porosity (m3.m-3) and density (Mg m-3) of the soil; the mean weight diameter (MWD, mm) of the aggregates; and the percentage of aggregates resistant to rainfall were evaluated. The date of soil was analyzed with descriptive statistics for initial exploration and geostatistics, to analyze the spatial variability. There was spatial dependency and the parameter adjust range varied from 8 to 12 m under the treatments SD and SR for the aggregates and SR for macroporosity, total porosity and soil density. There was spatial dependency also under SP, for the aggregates, microporosity, and total porosity; under SC, for the aggregates; and under SDLE, for microporosity. Soil data with spatial dependence in the field were characterized both by high and low values in the same area. Therefore it is not adequate to consider these areas as homogeneous for future experiments and agricultural activities.
NAL Thesaurus:	Geostatistics Soil aggregates
Keywords:	Geoestatística Análise espacial Spatial variability
DOI:	10.5897/AJEST2016.2256
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPTIA)