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ABSTRACT
A device is described which can be used to dig a ditch to isolate soil blocks in the field. The ditch can be as deep as 1.5 m with a width of 2.5 cm thus minimizing the amount of soil disturbance in individual blocks. The necessary equipment can be fabricated in a well equipped shop with a minimum of expense.
1 Contribution of Texas Agric. Exp. Sta.
2 Associate Professor, Soil and Crop Sciences Dept., College Station, Texas 77843.
Received for publication February 7, 1975. Accepted for publication May 8, 1975.
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