Tree species diversity, topsoil conditions and arbuscular mycorrhizal association in the Sidama traditional agroforestry land use, southern Ethiopia
Zebene , Asfaw (2003). Tree species diversity, topsoil conditions and arbuscular mycorrhizal association in the Sidama traditional agroforestry land use, southern Ethiopia. Diss. ( sammanfattning /summary) Uppsala : Sveriges lantbruksuniv ., Acta Universitatis agriculturae Sueciae . Silvestria , 1401- 6230 ; 263 ISBN 91-576-6347-5 [Doctoral thesis] Abstract Sidama farmers cultivate trees to meet their food, wood, fodder and other service needs. Tree cultivation intensity has increased during the past three decades. Significant positive correlation was found between farm size and number of species, and number of stems per farm. The number of tree species per farm averaged 16 and ranged from 4 to 28. Within farms, about ten different field types were identified of which enset fields contain the highest number of species. Wealthy households have more tree species than poor households. In general the largest number of tree species, the large