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On-the-go Soil Strength Profile Sensor Using a Load Cell Array

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  031071,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.15389)
Authors:   Sun-Ok Chung, Kenneth A. Sudduth, John W. Hummel
Keywords:   Precision Agriculture, Sensor, Soil Strength, Soil Compaction, Cone Penetrometer

Soil strength has traditionally been determined using a cone penetrometer. The cone penetrometer readings are discrete point measurements and it is difficult to maintain statistical significance due to the variability in the data. A reasonable way to resolve the problem is to obtain a large number of measurements, a process that is time-consuming and laborious. A soil strength profile sensor that can take measurements continuously while traveling across the field would be preferable. Such an on-the-go soil strength profile sensor (OTG-SSPS) was developed using a load cell array. Multiple prismatic tips mounted in a main blade were extended from the leading blade edge and spaced apart to minimize interference from the main blade and adjacent sensing tips. The effects of extension and spacing of the tips were investigated and optimized through controlled tests. Relationships between soil strength measured by the sensor and by a cone penetrometer were obtained. The OTG-SSPS will be evaluated in different operating and soil conditions and used to map soil strength of fields.

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