La cocoteraie mondiale couvre une superficie d’environ 11,5 millions d’hectares. Les petites plantations (< 3-4 ha) fournissent 96 % de la production mondiale de coprah. Sur ces petites exploitations, le cocotier est presque toujours associé à d’autres cultures. Les planteurs, soit en raison d’une vieille habitude culturale, soit sous l’effet d’une pression foncière grandissante, essaient de va...

sarcheshmeh copper mine, with the final reserves of 828 million tons of sulfur ore and average grade of 0.74%, is known to be the largest open pit of iran and most probably the second largest copper mine in the world. this mine is located in the seismotectonic zone of central-iran, and 23 km away from the 150 km long rafsanjan active fault.in this study the vulnerability of the west wall of the...

this study is trying to exploitations view point and permanent management problems of rangeland to evaluate in ranches damavand summer rangeland in amol county. statistical society are utilizations 15 ranch that with three methods, collective property, private property and council property from rangeland utilization and randomly from among their number 88 was selected. the research tool was a q...

The Boundary Element Method has been applied to calculate stress distribution and stability of underground mines for disposal of chemical waste. A case similar to the Stripa mine in Sweden has been considered. The rock mass was granite, with major fracture zones represented by three families of planes mutually orthogonal and 100 meters distant from each other. The pre and post processor GiD [3]...