3. Results
Most farms in the Robusta coffee growing areas had sand clay loam soils (80% in Bushenyi and 44% in Ibanda) and the other farms either had clay or sandy clay soils. Most of the soils in Arabica
coffee growing areas (Kabarole and Kasese) were sandy clay loam, sandy loam and clay loam. The mean pH in Arabica and Robusta coffee growing areas were 6.18 and 5.31, respectively. Farms with
non-fruit trees and Robusta coffee had relatively higher soil organic carbon compared to the similar farms with Arabica coffee. Farms that did not have any trees had relatively low soil organic carbon compared to those with some trees irrespective of the type of coffee grown. The farms with a mixture of fruit and non-fruit trees had relatively higher soil organic carbon under Arabica coffee than other land management practices (Table 1). Overall results indicate that soil organic carbon was signifi-cantly positively correlated (r = 0.885, P = 0.000) with nitrogen and weakly correlated with pH (r = 0.036) and phosphorus (r = 0.134).