4. Results
4.1. Dynamics of the baseline
The simulation results show a substantial amount of annual soil loss from sloping fields, averaging 29.97 tons/ha for fields under maize and 26.64 tons/ha for fields under cassava. Soil loss from maize fields corresponds to an average annual N loss of 17.43 kg/ha as shown in Table 3. As a result, the average amount of total N decreases from 0.09% in year 1 to about 0.05% in year 25 as shown in Fig. 4.