the Symposium on Wheats for More Tropical Environments - cimmyt

319Table 1. Private and social profitability of wheat and two alternatives by domain, ThailandVariableNet private profits~./Yield (kg/ha)Price ($Iton)Total revenue ($/ha)Tradeable costs ($/ha)!2..1Nontradeable costs ($/h~)£.1Returns to land ($/ha)~/Net social protifs~jPrice ($Iton)Total revenue ($/ha)Tradeable costs ($/ha) ~INontradeab~losts ($/ha)£.lLand ($/ha)-!-Net social profitability ($/ha)9'/Lowlands(inadequatedry-seasonRainfed uplandswater)Wheat Maize Mungbean Wheat1000 1500 450 1000227 111 326 227227 167 147 22766 21 11 52111 104 86 9650 42 50 79190 117 333 190190 176 150 19064 20 10 51110 103 86 9550 50 50 0-34 3 4 44Breakeven yieldsb./At farm-level market price,with tariff (kg/ha)At farm-level real price,without tariff (kg/ha)At mill-suggested price (kg/ha)10301179135815771479450438652768885Research cost ratio-V1.270.980.970.68a I Based on unadjusted farm-Ievel--market prices~I Costs of inputs that are imported or exported and represent a foreign exchange costc I Domestic resources, without a foreign exchange costdI Calculated as a residuali./ Based on real prices adjusted for policy-induced price distortions, e.g., wheat tariffil Estimated from <strong>the</strong> residual, calculated under net private profits for <strong>the</strong> bestalternative use of landgj A positive number indicates comparative advantage for that crop0.1 The minimum yield required to repay costsiI A ratio of less than 1 indicates comparative advantage