منابع مشابه
Relationships Between Soil Salinity, Sap- Sugar Concentration, and Health of Declining Roadside Sugar Maples (Acer saccharum)
A study of 50 sugar maples {Acer saccharum) along Gates Mills Boulevard in Gates Mills, Ohio, showed that a tree's sap-sugar concentration tended to increase with decreasing tree health and increasing soil salt concentration. Relative tree health was determined by growth ring analysis. Salt concentration in soil was determined by measuring soil extract conductivity. Extract conductivity correla...
متن کامل"salty" Syrup from Roadside Sugar Maples in Decline
M.F. MORSELLI and M.L. WHALEN Maple Research Laboratory Botany Department College of Agriculture and Life Sciences University of Vermont October 1987 FINAL REPORT We had two objectives in the study of sugar maples which showed signs of decline and stress on a roadside where deicing salt was used in the winter. One goal was to determine If tree stress is related to the levels offsodium and chlor...
متن کاملHeart Rot and Cavity Tree Selection by Red-cockaded Woodpeckers
Previous studies implied that decayed heartwood was important to cavity tree selection by redcockaded woodpeckers (Picoides borealfs), but the results were inconcIusive because they either lacked a control or were limited to 1 age class of trees. We compared the incidence of heart rot in loblolly and longleaf pines (Pinus taeda and P. palust7.fs) undergoing cavity excavation to the incidence of...
متن کاملBeck ,
We discuss and give elementary proofs of results of Brion and of LawrenceVarchenko on the lattice-point enumerator generating functions for polytopes and cones. While this note is purely expository, its contains a new proof of Brion’s Theorem using irrational decompositions.
متن کاملDo you want sugar with your tree?
Why do we plant trees into our landscapes? The answer is easy. We plant them because they filter dust and absorb pollution, provide shade, shelter, deflect and soften noise, reduce wind velocity and glare. The aesthetic of tree lined streets and green spaces have been shown to have positive psychological and health benefits to human society including lower rates of mental illness, violence and ...
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ژورنال
عنوان ژورنال: Mayo Clinic Proceedings
سال: 2018
ISSN: 0025-6196
DOI: 10.1016/j.mayocp.2018.07.003