This research aims to evaluate the effects of seed scarification on five perennialAstragalus species including A. effusus, A. vegetus, A. subsecundus, A. brevidens and A.cyclophyllon in the field conditions. Seeds were sown after scarification with sandpaper byhand in the field of Homand Absard Rangeland Research Station, Damavand, Iran in autumnin 2008. The seeds were sown using split plot des...

thegenus achillea is one of the most important medicinal plants in the asteraceae family. nineteen species of this genus have been described in the flora iranica, of which achillea aucheri boiss is an endemic species to iran. given the effect of geographic location on the quality and yield of essential oil, we performed an investigation to determine oil contents of a. aucheri growing at differe...

since the ancient times, burial practices have displayed certain characteristics among different iranian ethnic groups and regions were influenced by the local religious orientations, traditions and environments, and are regarded as part of the spiritual culture of any given population. indeed, religious beliefs play the main role in this diversity. because of the empire’s long endurance and va...

Large cities and metropolitan areas in developing countries are growing rapidly. These areas grew by attracting all facilities, services and capital of the country. Tehran has been the major city and center for decision and policy making in various administrative, political, economic and socialaspects. This political focus has brought economic, social, educational focus that attracted a vast ma...

 Homand Absard Rangeland Research Station is located 70 km northeast of tehran and 15 km southeast of Damavand with an altitude of 1972 m a.s.l., an average annual rainfall of 333 mm,  and a cold semi-steppe climate. In order to compare  the seed production of Vicia villosa under different cultivation seasons and methods, the seeds were initially collected from natural habitats similar to the m...

Abstract Xenocrysts and xenoliths in Upper Cretaceous pyroclastics on Mount Carmel (northern Israel) represent a series of similar magma-fluid systems at different stages their evolution, recording continuous decrease oxygen fugacity (fO2) as crystallization proceeded. Corundum coexisting with Fe-Mg-Cr-Al spinels, other Fe-Mg-Al-Na oxides, Fe-Ni alloys apparent cumulates crystallized fO2 values...

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Use of efficient methods of weed control with as regards environmental sustainability as well as increased crop yield and also weed resistance to herbicides is essential. In order to, an experiment was conducted in 2012 in the Damavand jaban in Iran. Experiment treatments were compared in a split plot design by a randomized completely block design with 3 replication. The used variety of maize w...