Vincent de Leijster

164 Table A4-5. Treatment specific erosion rates measured in erosion experiments in almond, olive or vine plantations in Mediterranean Europe. Conventional tillage (CT) is given in absolute soil loss (t -1 ha -1 yr -1 ). No tillage (NT) and green manure (GM) are expressed as soil loss relative to CT as reported in the given study. Mean SD n References CT (t -1 ha -1 yr -1 ) 19.6 26.85 12 (Almagro et al., 2016; Álvarez et al., 2007; Durán Zuazo et al., 2008a; Gómez et al., 2009, 2017, 2011; Ruiz-Colmenero et al., 2013) NT rel (% rel. to CT) -71.4% -85.0% 6 (Almagro et al., 2016; Gómez et al., 2009, 2017, 2011; Ruiz- Colmenero et al., 2013) GM rel (% rel. to CT) -73.1% -79.2% 6 (Durán Zuazo and Rodríguez Pleguezuelo, 2008; Gómez et al., 2011) CM - - - - Table A4-6. Sensitivity analysis: NPV, IRR and DPBT calculated for different discount rate scenarios. NPV = net present value, IRR = internal rate of return, DPBT = discounted payback time. NPV (€ ha -1 ) Discount rate CT NT GM CM scenario r Mean SD Mean SD Mean SD Mean SD 3.75% 9,682.59 1,621.44 1,608.69 931.50 3,671.11 1,460.86 11,491.66 3,437.38 4.25% 8,705.73 1,484.78 1,310.33 851.45 3,076.64 1,423.28 10,326.42 3,241.26 Baseline 5.00% 7,364.09 1,388.41 732.38 806.51 2,284.49 1,294.49 8,630.52 2,942.15 5.75% 6,092.70 1,245.35 299.17 716.11 1,699.47 1,215.56 7,233.51 2,758.76 6.25% 5,498.76 1,186.85 60.24 671.30 1,221.20 1,075.88 6,601.66 2,601.25 IRR (%) Discount rate CT NT GM CM scenario r Mean SD Mean SD Mean SD Mean SD 3.75% 13.4% 1.5% 6.2% 1.4% 8.3% 1.7% 13.9% 2.8% 4.25% 13.5% 1.5% 6.4% 1.3% 8.2% 1.8% 13.8% 2.8% Baseline 5.00% 13.5% 1.5% 6.3% 1.4% 8.2% 1.8% 13.7% 2.7% 5.75% 13.4% 1.5% 6.3% 1.4% 8.3% 1.8% 13.7% 2.8% 6.25% 13.5% 1.5% 6.3% 1.3% 8.2% 1.7% 13.8% 2.8% DPBT (y) Discount rate CT NT GM CM scenario r Mean SD Mean SD Mean SD Mean SD 3.75% 11.2 1.4 19.4 3.5 16.0 3.0 11.3 2.6 4.25% 11.4 1.4 20.0 3.6 16.7 3.4 11.5 2.7 Baseline 5.00% 11.7 1.5 22.1 4.4 17.8 3.9 11.9 2.9 5.75% 12.3 1.7 24.2 4.7 19.0 4.5 12.4 3.2 6.25% 12.5 1.7 25.7 4.6 20.4 4.9 12.5 3.3