Measuring mechanical impedance in clayey gravelly soils

Revista Brasileira de Ciência do Solo

R. Stolf²  D. K. Cassel¹  L. D. King¹  K. Reichardt¹ 

[1] ,Universidade Federal de São CarlosAraras SP

关键词: impact penetrometer;    soil resistance;    hard clayey and gravelly soils;    spatial distribution;    penetrômetro de impacto;    resistência do solo;    solos de alta dureza argilosos e pedregosos;    distribuição espacial;   

DOI  :  10.1590/S0100-06831998000200003

来源: SciELO

【 摘 要 】

Mechanical impedance of clayey and gravelly soils is often needed 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-operated "Stolf" impact penetrometer to measure mechanical impedance (soil resistance). The research was conducted in Raleigh, North Carolina, USA (35º 45'N, 78º 42'W, 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 transect perpendicular to the corn rows in each of four tillage treatments. The data permitted three-dimensional displays showing how mechanical impedance changed with depth and distance along the transect. The impact penetrometer proved to be a useful tool to collect quantitative mechanical impedance data on "hard" clayey and/or gravelly soils which previously were difficult to reliably quantify.

【 授权许可】

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