Data/hora: 15/05/2024 02:55:44

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	22/11/2002	
Data da última atualização: 	17/09/2019	
Autoria: 	STOLF, R.; CASSEL, D. K.; REICHARDT, K.	
Título: 	Measuring mechanical impedance in clayey gravelly soils.	
Ano de publicação: 	1998	
Fonte/Imprenta: 	Revista Brasileira de Ciencia do Solo, Campinas, v.22, n.2, 189-196, 1998.	
Idioma: 	Português	
Conteúdo: 	Mechanical impedance of clayey and gravelly soils is often neede to interpret experimental results from tillage and other field experiments.Its measurement is difficult with manual and hydraulic penetrometers, which often bend or break in such soils. The purpose of this study was to evaluate the feasibility of a hand-opereted "Stolf" impact penetrometer to measure mechanical impedance (soil resistance). The research was consucted in Raleigh, North Carolina, USA (35 45N, 78 42W, elevation 75 m). Corn was planted on April 19, 1991. Penetrometer measurements were taken on May 10, 1991, in 5 cm intervals to 60 cm at 33 locations on a trassect perpendicular to the corn rows in each of four tillage treatments. The data permitted three-dimensional display showing howmechanical impedance changed with depth and distance along the transect. The impact penetrometer proved to be a useful tool collect quantative mechanical impedance data on "hard" clayey and/or gravelly soils which previously were difficult to reliably quantify.	
Thesagro: 	Solo; Solo Argiloso.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (8609-1) - ADD - AP - -- -  -  - 1999.00000 - DIS
CNPS - (8757-1) - ADD - AP - -- -  -  - 1999.00000 - DIS