Business as Usual vs Agroforestry
Farmers or project managers can compare different agroforestry options according to the required livelihoods, economic or environmental objectives. By extrapolating and combining projections, the user can evaluate the performance of a ‘mix’ of different land uses on different scales. On a farm scale, the comparison could entail different crop combinations. On a landscape scale, different land uses are compared in a larger region.
Comparison of the average 25-year annual performance of a 1-Ha BASELINE (Gentle slope (5-15%); medium erosion risk; <10 trees /Ha & Maize - Bean - Cassava); with + INVESTMENTS Grass (5%) + Calliandra / Leucaena (5%) + light progressive terracing; Grevillea 6-year cycle; 60 trees/ha; and Avocado 20 trees/Ha in Gatsibo, Rwanda.
The figure on the left shows a 30-year projection of the annual average plot cover for a maize-bean intercrop. The figure on the right shows how tree and crop cover might expand and contract over the same period of time. In the FarmTree model you can adjust variables such as plot cover, time of tree planting, and change life cycle settings, for example to vary tree harvest intervals.