Vincent de Leijster

129 Chronosequence analysis of economic performance of agroforestry coffee farms in Colombia 6 Table 6-3. Development of costs, benefits, non-marketed benefits, and net revenues over time since agroforestry implementations. PsR 2 is the pseudo R 2 , which is McFadden for GLM Gaussian Log (GausLog) and observed against predicted R 2 for sigmoid models (Sigmoid). Graphs of significant relations are included in the appendix (Figure. A5).  Variable Model Coefficient±SD T / P F / P PsR 2 df Revenues (actual and potential) Gross revenues (actual) Coffee GausLog 0.98±1.01 T=-1.7 F=3.15 1.5*10 -3 116 P=0.08 P=0.08 Timber + tree fruits Sigmoid a=13.8 b=1.39 c=8.9*106 F=28.7 0.19 120 P=0.005 Musa fruits GausLog 0.93±1.02 T=-2.7 F=4.6 2.8*10 -3 110 P=0.008 P=0.03 Value non-marketed products and services (potential) Timber Sigmoid a=80±6.0 b=0.88±1.6 c=2.8±1.3 F=6.1 P=0.015 0.04 109 Carbon Sigmoid a=15±2.5 b=0.32±0.27 c=4.3±2.7 F=8.2 P=0.007 0.15 40 Fruits GausLog 0.968±1.023 T=-1.4 F=2.2 1.9*10 -3 79 P=0.15 P=0.14 Musa fruits GausLog 0.980±1.016 T=1.24 F=1.21 6.9*10 -4 109 P=0.22 P=0.27 Management costs Pest control GausLog 1.02±1.01 T=1.7 F=2.5 1.7*10 -3 122 P=0.14 P=0.13 Herb control GausLog 0.99±1.01 T=-1.2 F=1.5 9.9*10 -4 121 P=0.25 P=0.22 Fertilization GausLog 0.99±1.01 T=-0.79 F=0.62 3.6*10 -4 121 P=0.43 P=0.43 Harvest, processing, transportation GausLog 0.976±1.01 T=-2.19 F=4.89 2.6*10 -3 121 P=0.03 P=0.027 Tree management GausLog 0.974±1.028 T=-0.95 F=0.94 1.1*10 -3 119 P=0.34 P=0.33 Musa management GausLog 0.981±1.023 T=-0.87 F=0.62 4.2*10 -4 122 P=0.39 P=0.43 Net revenues Net revenue coffee GausLog 0.99±1.01 T=-1.3 F=1.7 8.3*10 -3 117 P=0.20 P=0.19 Actual net revenue GausLog 0.99±1.01 T=-1.4 F=1.8 8.6*10 -4 117 P=0.18 P=0.18