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

Citation:  Paper number  011060,  2001 ASAE Annual Meeting. (doi: 10.13031/2013.15697) @2001
Authors:   Pedro Andrade, Uriel Rosa, Shrini Upadhyaya, Bryan Jenkins, Juan Aguera, and Malcom Josiah
Keywords:   Precision farming, Profile sensor, instrumented tine, Compaction sensor

Variability in crop yield has been found to be influenced by variability in soil moisture status. Soil moisture variability is governed by poor soil infiltration characteristics which in turn is associated with increased level of soil compaction and/or changes in soil texture. Liu et al. (1996) developed an instrumented tine to measure soil cutting resistance and soil moisture content over a 30 cm layer. In this study we have extended this concept to measure soil cutting force profile to a depth of 63 cm in increments of 7.5 cm. The profile sensor (PS) showed that the cutting force is influenced by soil moisture content, depth of operation of the tine and vertical location of the cutting element. Statistical analysis of the field data resulted in a very high coefficient of multiple determination of 0.978 which is quite encouraging.

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