Effects of spatial variability on soil physical  attributes in areas cultivated with cassava  prepared with different tillage systems

da Vitória, Edney Leandro; Fernandes, Adriano Alves

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dc.creator	da Vitória, Edney Leandro
dc.creator	Fernandes, Adriano Alves
dc.date	2018-02-01
dc.date.accessioned	2022-03-21T20:07:37Z
dc.date.available	2022-03-21T20:07:37Z
dc.identifier	https://comunicatascientiae.com.br/comunicata/article/view/1030
dc.identifier	10.14295/cs.v8i2.1030
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/77759
dc.description	The objective of this study was to understand the effect of the spatial variability of the soil physical attributes in areas cultivated with cassava with different soil tillage systems, using the techniques of classical statistics and geostatistics. The experiment was carried in 2013 in São Mateus - ES, Brazil, on a cohesive ultisol, with a plan relief. The preparation of the soil for transplanting were made in two adjacent areas of approximately 0.5 ha each, using up to two passes of a harrow disk or two passes of a chisel plow. The following soil physical attributes were studied 90 days after transplanting: soil density (DS), macroporosity (Macro) and microporosity (Micro), soil water content according to two preparations systems and two depth ranges. Eighty plants were randomly selected to perform the experiment. The soil physical properties resulted in spatial variability due to the strong dependence for all variables, tillage system and soil depth. The semivariograms were adjusted to the spherical and exponential models for the evaluated physical attributes. Except for water content, it was observed an increase in the range (A0) with increasing depth for both tillage systems. The soil water content presented a decrease about 23% for the harrowing and scarification systems.	en-US
dc.description	The objective of this study was to understand the effect of the spatial variability of the soil physical attributes in areas cultivated with cassava with different soil tillage systems, using the techniques of classical statistics and geostatistics. The experiment was carried in 2013 in São Mateus - ES, Brazil, on a cohesive ultisol, with a plan relief. The preparation of the soil for transplanting were made in two adjacent areas of approximately 0.5 ha each, using up to two passes of a harrow disk or two passes of a chisel plow. The following soil physical attributes were studied 90 days after transplanting: soil density (DS), macroporosity (Macro) and microporosity (Micro), soil water content according to two preparations systems and two depth ranges. Eighty plants were randomly selected to perform the experiment. The soil physical properties resulted in spatial variability due to the strong dependence for all variables, tillage system and soil depth. The semivariograms were adjusted to the spherical and exponential models for the evaluated physical attributes. Except for water content, it was observed an increase in the range (A0) with increasing depth for both tillage systems. The soil water content presented a decrease about 23% for the harrowing and scarification systems.	pt-BR
dc.format	application/pdf
dc.language	eng
dc.publisher	Federal University of Piauí	en-US
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/1030/465
dc.rights	Copyright (c) 2018 Edney Leandro da Vitória, Adriano Alves Fernandes	en-US
dc.source	Comunicata Scientiae; Vol. 8 No. 2 (2017); 221-229	en-US
dc.source	Comunicata Scientiae; v. 8 n. 2 (2017); 221-229	pt-BR
dc.source	2177-5133
dc.source	2176-9079
dc.subject	geostatistics	en-US
dc.subject	Manihot esculenta Crantz	en-US
dc.subject	tillage systems	en-US
dc.subject	soil physical properties	en-US
dc.subject	geostatistics	pt-BR
dc.subject	Manihot esculenta Crantz	pt-BR
dc.subject	tillage systems	pt-BR
dc.subject	soil physical propertie	pt-BR
dc.title	Effects of spatial variability on soil physical attributes in areas cultivated with cassava prepared with different tillage systems	en-US
dc.title	Effects of spatial variability on soil physical attributes in areas cultivated with cassava prepared with different tillage systems	pt-BR
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion