The fact that mean and median values of return on asset are not significantly different between groups neither confirm, in the specific circumstances of agricultural sector, Liang and Weng’s (2007) hypothesis of less efficient decisions under fair valuation, nor Black and Liu’s (2007) argument that under historic cost bad investment projects would be pooled with good projects and prevented from liquidation. In a similar way, no significant differences in standard deviation of return on assets confirms the absence of greater volatility under fair value and suggests that there is no significant transfers of gains and loses between periods.