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This paper presents a new microeconomic account system methodology that it allows the measurement of the welfare income from the multiple use of forest. The paper discuss the conceptuals and applications differences between the normalized system of national account (SNA) and the agroforestry account system (AAS) proposed by the author with the objective of measuring the adjusted convetional value added origined in the forest. These differences are ilustrated with the SNA and AAS applications in a dehesa case study with corkoak and holm-oak in Monfragüe area (Cáceres), both commercial and environmental economic values are considered.

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The public have an increasing interest in Dehesa environmental services (recreation, option and existence values). The growing Government incentives on environmental friendly agricultural practices have given a new opportunity for private economics of natural and environmental resources in Dehesa. This work presents the results from a Delphi questionnaire on owners’ preferences and demands of compensations for undertaking environmental conservation and improvement measures in Dehesa of Monfragüe shire. The private owners of Dehesa are investors that have, at the same time, commercial aims and private environmental services autoconsumption preferences. A contingent valuation questionnaire has been applied to a group of Dehesa ’ owners to measure the maximum willingness to pay (WTP) —to accept losses— of commercial capital income against the maintenance of private environmental services autoconsumption. The Delphi results show that owners’attitude is in favour to follow the environmental friendly agricultural practices, when the Government incentives are higher than the losses of commercial capital income plus a risk premium. The value of owners’ autoconsumption measured by the WTP question from the contingent valuation gives an autoconsumption profitability rate from 1% to 5% of the total market value of the Dehesa.