Econometric modeling of a dual translog cost function shows that the prices of intermediates inputs and household earnings have dominant effects on farmers'technical choices. Productivity gains are supposed to be due essentially to technical progress incorporated in the intermediates inputs necessary to vegetal productions. Finally, it is shown that output growth sharing (especially in the case of animal productions) has increased the share of the intermediates inputs more than the shares of the other inputs, beside it did not have any positive effects on the family labor income.
