Mastic (Chatlanqosh or turpentine) is a valuable tree species in most parts of the country, particularly around the southern slopes of the Alborz and Zagros mountain range distributed. Wild Mastic tree is mainly due to the adaptability and hard rocky ground tree and needless to excessive irrigation, it doesn't usually crop. It is the mountain range of the plant, giving it less water. The soil a...

Heavy metal pollutionis one of the largest problems in the Environment and human being. In industrial and urban areas trees can give better quantifications for pollutant concentrations and atmospheric deposition than non-biological samples. In order to know ability of Fraxinus excelsior­ (Ash tree) to reduce the concentrations of heavy metals and compared with the concentration of thes...

economic and environmental logging is important for sustainable wood production in the caspian forests, north of iran. predetermination of the skid trail network and directional felling is a usual recommended method to reduce logging impact. the aim of this study was evaluation of directional felling and finding factors effective on felling error. totally 135 trees were selected randomly for di...

Bark volatiles from green ash Fraxinus pennsylvanica were tested for electrophysiological activity by Agrilus planipennis using gas chromatographic-electroantennographic detection (GC-EAD) and for behavioral activity using baited purple traps in Michigan. GC-EAD analysis of the headspace volatiles of bark tissue samples from 0- and 24-h-old fully girdled (stressed) ash trees showed that the lat...

The paper begins with a brief history of botany leading to the first descriptions on plant life phenomena. It then moves on to plant physiology as a science with a proper identity in the XVIII century. The works by Duhamel du Monceau and the German forester Robert Hartig are pointed out as landmarks on the way to the future ecophysiology of trees. The Symposium «The Physiology of Forest Trees»,...