Fifteen-Year Growth of Six Planted Hardwood Species on Sharkey Clay Soil

摘要

Six hardwood species planted on Sharkey clay soil that had been disked the first 5 years for weed control were significantly taller at age 5 when compared to species grown on mowed sites. By age 15, there were no differences in heights within species except for sweet pecan. Average heights by species at age 15 were: cottonwood (Populus deltoides Bartr. ex Marsh.), 60 feet; sycamore (Platanus occidentalis L.), 38 feet; green ash (Fraxinus pennsylvanica Marsh.), 36 feet; sweetgum (Liquidambar styraciflua L.), 30 feet; Nuttall oak (Quercus nuttalli Palmer), 27 feet; and sweet pecan (Carya illinoensis (Wangenh.) K. Koch), 19 feet.