Data/hora: 22/06/2024 07:06:53

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 12/02/2015
Data da última atualização: | 25/05/2017
Autoria: | SILVA, R. B. da; DIAS JUNIOR, M. de S.; SILVA, F. A. de M.; FOLLE, S. M.; FRANZ, C. A. B.; SOUZA, Z. M. de.
Afiliação: | REGINALDO BARBOZA DA SILVA; MOACIR DE SOUZA DIAS JUNIOR; FRANCISCA ALCIVÂNIA DE MELO SILVA; SERGIO MAURO FOLLE; CLAUDIO ALBERTO BENTO FRANZ, CPAC; ZIGOMAR MENEZES DE SOUZA.
Título: | Predition of soil shear strength in agricultural and natural environments of the Brazilian Cerrado.
Ano de publicação: | 2015
Fonte/Imprenta: | PESQUISA AGROPECUÁRIA BRASILEIRA, Brasília, DF, v. 50, n. 1, p. 82-91, jan., 2015.
Idioma: | Inglês
Notas: | Título em português: Predição da tensão de cisalhamento do solo em ambientes agrícola e natural do Cerrado brasileiro.
Conteúdo: | The objective of this work was to develop uni? and multivariate models to predict maximum soil shear strength (tmax) under different normal stresses (?n), water contents (U), and soil managements. The study was carried out in a Rhodic Haplustox under Cerrado (control area) and under no?tillage and conventional tillage systems. Undisturbed soil samples were taken in the 0.00?0.05 m layer and subjected to increasing U and ?n, in shear strength tests. The uni? and multivariate models ? respectively tmax=10(a+bU) and tmax=10(a+bU+csn) ? were significant in all three soil management systems evaluated and they satisfactorily explain the relationship between U, ?n, and tmax. The soil under Cerrado has the highest shear strength (t) estimated with the univariate model, regardless of the soil water content, whereas the soil under conventional tillage shows the highest values with the multivariate model, which were associated to the lowest water contents at the soil consistency limits in this management system.
Palavras-Chave: | Cohesion limits; Machine-ground interaction; Precompression stress.
Thesaurus Nal: | soil compaction.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/117910/1/Prediction-of-soil-shear.pdf
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (57271-1) - UPE - AP - PP - 630.52081 - P474 -  - DIS