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|Title:||Ecological Studies on the Natural And Cultivated Vegetation In Kelli Area — River Nile State|
|Authors:||Tomadir Osman Gadelerb|
|Abstract:||Abstract This work has been designed to study the ecology of the natural and cultivated vegetation in Kelli Area. Nile province. The set up, biodiversity, present state and vegetative behavior of the dominant plant species in the area were also considered. The dominant species encountered are: Brassica juncea (L), Cleome gynandra (L), Amaranthus viridis (L), Chozophora plicata (vahl) A. Jass ex. Spreng, Cyperus alopecuroides Rottb, and portulaca oleracea (L). The climatic conditions in Kelli area allow the production of a wide range of agricultural crops e.g wheat, broad beans, onion, and vegetables. The agricultural _activities are practiced in two rotations; a winter and summer. Broad beans and onion are common in winter and fodders in summer (Zea mays, Sorghum biC0lO7f, and Medicago saliva) in addition to vegetables. The agriculture within the area faces many problems e.g. continuous sand burial due to sand storms, removal of natural vegetation, land degradation and human disturbance. The ﬁrst surveys of the soils of the area have shown that the soils can be divided into three zones (terraces) starting from the bank of the River—Nile upwards : terrace I lies in the vicinity of the Nile, terrace II lies adjacent to the ﬁrst one and terrace III lies far away from the Nile. The width of each terrace dependson local topography. The soils consist of clay, sand and silt. The data on chemical properties showed that the salinity and pH increased as we go away from the Nile, hence higher values were recorded in terrace III. Wherejas the moisture content decreases in the same direction. The number of plant species recorded in terrace II constitute 91.3% of those recorded in terrace I and only 10% were encountered in terrace III. The mean of ecological measures (height, density, percentage cover and productivity) of dominant plant species suggest that the species predominating terrace I enjoy the best conditions compared to those of terrace II. The most important ecological factor affecting these parameters was the moisture COI1t€I1t. The present study has suggested some recommendations to achieve better management on natural vegetation and agricultural management in the area.|
|Description:||Submitted For Fulﬁllment of the requirements of the degree of Master of Science|
|Appears in Collections:||Masters theses : Science|
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