الفهرس 
Treatment of dataOnly 14 pages are availabe for public view
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Abstract
The present study at evaluatinq the interacting growth of the populations of T. nilotica, a tree of up to 6m tall, and (7. dioscoridis, an evergreen shrub of about 2 m tall, with emphasis on their competitive abilities and the role which they play in the changement of soils in the middle of Nile Delta region, Egypt. Both species have a heavy growth as a result of post-agricultural succession in the study area (abandoned military base). A vegetation map for the study area was drawn. The plant species were listed and their dominance was estimated visually. Ten plots were then selected to represent 3 growth situations: 4 representing the mixed growth of both the dominant species, and 6 representing their pure growth (three plots for each). Estimation of the standing crop phytomass for the two dominant species was used by harvest and regression technique. Plant samples were collected from 27 stands representing three growth situations (pure population of T. nilotica, pure population of C. dioscoridis and mixed populations of the two species) and three growth stages (size classes): small, medium and large for estimating their inorganic and organic contents. Soil samples were also collected to determine some of their physical and chemical characters.