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I <br /> <br /> consisted of disking and/or mowing between trees two or three times <br /> during the growing season for the first 3 years, and an application of <br /> herbicide (roundup) sprayed around individual crees in June or July. <br /> After 5 years, sycamore survival averaged 93% and mean height average <br /> 13.6 ft for two plantations; cherrybark oak survival averaged 74% meam <br /> height and 6.4 ft for three plantations; survival and mean height were <br /> 48% and 2.7 ft for pecan and 46% and 6.8 ft for sweetgum. After 3 <br /> years, green ash had 97% survival and a mean height of 7.9 ft on one <br /> plantation. After 2 years bald cypress had 98% survival mhd a mean <br /> height of 4.1 ft. <br /> <br /> 18. Waldrop, T.A., E.R Buckner, and A.E. Houston. 1983. Suitable trees for <br /> the bottomlands of west Tennessee. Pages 157-160. IN Proceedings of the <br /> second biennial southern silvicultural research conference. U.S. Forest <br /> Service General Technical Report SE-24 New Orleans, LA. <br /> <br /> This study examines three species: sweetgum, green ash, and sycamore: <br /> two seed sources for sweetgum and sycamore; and three cultural <br /> treatments (fertilization, disking, and mowing) to determine which <br /> combination(s) would be best suited to abandoned agricultural fields. <br /> The study site was on the floodplain of a tributary of the Wolf River in <br /> southwest Tennessee. The fields were farmed for soybeans until 1979~ <br /> flooding occurred less than annually, but enough to make soybean <br /> planting risky. The soils were silt loam, 5.4-6.6 pH, and lower in <br /> phosphorus and potassium than most soils used for agricultural purposes. <br /> Seedlings were planted in the spring of ].980. Five species/seed source <br /> ~ombinations (sycamore, green ash sweetg~n from the Virginia coastal <br /> plain, and sweetgum and sycamore from the Louisiana gulf coast) were <br /> tested, with fertilization as the main treatment. Disking and mowing <br /> were tested at the subplot level ~fter three growing seasons, survival <br /> was over 90% for all treatments, and there were no significant survival <br /> differences among the five species/seed source combinations. Survival <br /> was slightly lower in the fertilized plots (93% versus 95%), perhaps due <br /> to the exceptionally dry season following planting and fertilization in <br /> 1980. Seed source did not significantly affect height growth after <br /> three growing seasons. Sycamore grew the fastest (mean height of 9.0 ft <br /> after three growing seasons) followed by green ash (6.1 it) and <br /> sweetgum (5.4 it). Fertilization increased the height growth of green <br /> ash by 25%, sycamore, 19% and sweetgum, 16%. Disking improved growth <br /> significantly over mowing for all species. Response was greatest for <br /> sycamore (52%), followed by green ash (50%) and sweetgum (26%). Disking <br /> and fertilization both increased growth when applied alone but <br /> combining the two did not produce a significant growth advantage, <br /> especially for sycamore. <br /> <br />2130 7 <br /> <br /> <br />