| This research aims to study and estimate of quantities optimal combinations (labor and capital) used by farmers the crop in the province to achieve sizes different production at (the break-even point, the size of production sample, the optimal size of production, production size of the maximization profit) and the extent of these quantities with quantities sizes actual Farmers harvest, and urged farmers to adopt these quantities and sizes of the study, and through the use of Cobb Doclas and derivatives economic concluded that the size of production at the break-even point is 1675.99 kg / don and the amount of work that achieved is 5.28 man / day and the capital needed for this size is 70359.56 dinars, while the actual size to produce the sample 3026 kg / don and the amount of work that achieved amounted to 12.31 man / day and the capital needed for that reached 426,126 dinars, while the optimal size of the production, which minimzing costs amounted to 3168 kg /don and quantitative optimum necessary to achieve total 9.72 man / day and the amount of capital optimization necessary to achieve was 4,261,268 dinars, while the size of production maximization profit amounted to 4089 kg /don This is in line with the logic of economic theory, the quantitative optimization of work that maximizes profit of 33 man / day, and quantitative optimization of capital money that maximizes profit amounted to 348,310 dinars, and found that the largest net grossing farms if the produced when size maximization profit amounted to study 453,250 dinars while the when the optimal size of production 431,850 dinars, while the when the size of the production sample 141,869 dinars, while the values of marginal rate Substitution Technical stood at breakeven point 15899.59 and at the optimal size of production amounted to 8587.74 and when the size of the production sample amounted to 6780.90 while the when-sized maximization profit 2529.48, and demonstrate the value that it is positive and decreases whenever the expansion of production and it shows that the production in the second phase, the extents productivity has was 1346.01 kg between break-even point and the size of production sample and long productive between the volume of production sample and the optimal size of the production has reached 331 kg, while the 732 kg between optimal size of production and size maximization profit, and these levels decrease and converge whenever the expansion of production and evidence for that possibility of expanding the use of resources farm down to the size of the maximization profit. |