Abstract
Arizona law mandates that plant material left in the field following cotton harvesting must be buried to reduceoverwintering sites for insects. Conventional operations which accomplish this burial tend to be energy-intensive.Reduced tillage systems have been shown to offer significant energy savings over conventional systems, yet canaccomplish the same degree of trash burial. Four, controlled-traffic subsoiling treatments were investigated to determinetheir influence on energy requirements and yields of the Uprooter-Shredder-Mulcher reduced tillage system. Subsoiling inthe beds required significantly less energy than subsoiling in the furrows or using a triplex subsoiler. Elimination ofsubsoiling altogether required the least energy. Yields were not significantly affected by subsoiling methodology, nor werethey significantly lower in the non-subsoiled plots. All minimum tillage treatments resulted in significantly higher yieldsthan a conventional tillage treatment.
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