Responses of Loblolly Pine, Sweetgum and Crab Grass Roots to Localized Increasesin Nitrogen in Tow Watering Regimes

摘要

Root responses to differences in availability of nitrogen and soil water werestudied in loblolly pine (Pinus taeda L.) seedlings grown in monoculture and in competition with sweetgum (Liquidambar styraciflua L.) or crab grass (Digitaria spp.).