This is not a peer-reviewed paper. Paper Number: 01-1016 An ASAE Meeting Presentation
VARIABLE DEPTH TILLAGE BASED ON GEOREFERENCED SOIL COMPACTION DATA IN COASTAL PLAIN REGION OF SOUTH CAROLINA by Serap Gorucu Graduate Student
Ahmad Khalilian Professor
Young J. Han Professor
Roy B. Dodd Professor
Francis J. Wolak Professor
Muharrem Keskin Graduate Student
Department of Agricultural and Biological Engineering Clemson University Clemson, SC 29634, USA Written for presentation at the 2001 ASAE Annual International Meeting Sponsored by ASAE Sacramento Convention Center Sacramento, California, USA July 30-August 1, 2001 Abstract. This study deals with determining the optimum tillage depth from geo-referenced soil compaction and soil electrical conductivity data. Soil compaction data was analyzed and mapped. Based on the measurements, 75% of the test field required shallower tillage depth than recommended tillage depth for coastal plain soils. Variable depth tillage, no-tillage and conventional tillage systems were compared and the relationships between tillage depth, soil electrical conductivity, crop responses, and yield were investigated in cotton production. The results showed that the main factor in yield was soil texture. Also, the energy savings of 15.82 kW.h (42.8%) and fuel saving of 4.58 L (28.4%) could be achieved by adoption of variable-depth tillage as compared to uniform-depth tillage. Keywords. Variable depth tillage, precision farming, soil compaction, coastal plain soils, cotton, soil electrical conductivity
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