Abstract
This study assesses the effects of the distance between a planted row and the edge of a tire during post-subsoiling traffic. It was conducted in a large soil bin at the National Tillage Machinery Laboratory, Auburn, AL, utilizing special equipment to eliminate all but test-related traffic, thus assuring the necessary control of all depth and spacing operations. Growth, yield, and root characteristics of cotton ( Gossypium hirsutum L.) and the strength and bulk density of soil created by seven traffic treatments was measured. Tractor wheel traffic was made directly over the subsoiled channel (treatment T-1), and at 10 (T-2), 20 (T-3), 30 (T-4), 40 (T-5) and 50 (T-6) cm to each side of the subsoiled channel. Traffic treatment T-7 was not subsoiled and the wheel edge was more than 50 cm from the planted row. The study indicated that the edge of the tire must be more than 30 cm from the channel to prevent recompaction that adversely affects growth and yield.
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