This study aimed to assess the effects of various soil types andorganic growing media on the growth of some tree seedlings. It wasconducted in the nursery of the Faculty of Forestry, University ofKhartoum, Shambat, during March-November 2006. Soil growing growthmedia consisted of sand, silt and clay, while the organic matter consistedof decomposed mango humus. Seeds of Tamarindus indica L., Albizialebbeck (L.) Benth. and Acacia senegal (L.) Wild. were directly sown inpolyethylene bags (10x20 cm). Seedlings shoot height, diameter, shootand root biomasses of all the species were positively significantly affectedby clay and silt media. Root growth was significantly greater in sand thanother media. Mango humus had negatively (P < 0.05) affected seedlings'growth of all the tested species. Nonetheless, seedlings' survival rate wasfar better in the sand than in the other media. Silt and clay can be used assuitable growing media; pure sand may be used if production of seedlingswith well developed root system is envisaged. However, type and sourceof organic matter should be cautiously chosen before it can be confidentlyused as a suitable growing medium
The objectives of this work were (i) to investigate thecontribution of the baobab tree (Adansonia digitata L., known locally as"tebeldi") fruits extraction in rural household’s income and tree speciesconservation and (ii) to identify and analyze the determinants of incomegeneration from A. digitata fruits extraction. Five villages were selectedin Rashad Locality, South Kordofan State, based on proximity gradient tothe resource. A sample of 276 households was taken from the selectedvillages, using a stratified sampling technique. Both quantitative andqualitative data were collected in 2009, using participatory rural appraisaltools. The results indicated that the household’s annual average incomefrom the A. digitata fruit sale was 44% of the total household income,aggregated across wealth categories. The results also showed that wealth,proximity to the resource and other household characteristics affected theincome generation from A. digitata fruit sale. It was concluded that the A.digitata fruits extraction plays a key role in improving the livelihood ofthe rural households and conserving the tree species. Rural developmentand future conservation interventions should pay attention to the role of A.digitata fruits extraction in rural economic development andenvironmental sustainability
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