Simulated Cattle Injury to Planted Slash Pine: Defoliation

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Abstract
To simulate a single defoliation by livestock or wildlife, needles of slash pine were hand clipped once at 6, 18 and 30 mo. after planting. Survival and height growth were measured for 6 growing seasons after removing 0, 25, 50, 75 and 100% of the foliage. Survival was excellent except when 100% of the needles were removed 6 mo. after planting. Reductions in rate of height growth occurred only with the most severe levels of defoliation and were still apparent for 3 yr after treatment. Even so, the greatest accumulated loss in height was < 1 m over the 6-yr period.

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