Since density is considered as one of the most important numerical indices to explain quantitative values of a plant community by affecting on many aspects and activity of ecosystem, on the other hand, awareness about plants distribution pattern in environment is an essential preparation for measurement and study of vegetative cover, therefore, in this research determination of density and dist...

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REAL GROSS domestic product (GDP) decreased at an annual rate of 6.2 percent in the fourth quarter of 2008, according to the “preliminary” estimates of the national income and product accounts (NIPAs) (chart 1 and table1).1 In the third quarter, real GDP declined 0.5 percent. The fourth-quarter decrease was the largest since the first quarter of 1982. It was revised down 2.4 percentage points f...