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Inexpensive Equipment for Evaluation of Tillage Power Requirements¹

ABSTRACT

Portable inexpensive equipment is described for measurement of tillage power requirements. Equipment consisted of (i) a modified chisel plow; (ii) a four-wheel drive pickup; (iii) a hydraulic system including pressure transducer; and (iv) a voltage integrator-timing device. A calibration curve related the voltage output from the pressure transducer to force required to pull the chisel plow. Coefficients of variation among test fields ranged from 4.3 to 5.9% for voltage output, 3.7 to 5.0% for velocity, and 7.2 to 11.0% for calculated tillage power requirements. Construction cost was approximately $1000 plus labor. The chisel plow was transported in the pickup or on a small trailer.

¹ Contribution from the Nebraska Agric. Exp. Stn., Lincoln, NE. Published as Paper no. 7996 Journal Series.

² Assistant Professor, Univ. of Nebraska, Lincoln, NE 68583; Graduate Assistant, Professor Emeritus, and Professor, Montana State Univ., Bozeman, MT 59717.

Received for publication February 25, 1986.