Since 1990, Swedish agriculture has stagnated in production, while the number of firms and employed persons has fallen considerably. Even other factors of production than labour and the size of the livestock have fallen somewhat. We can yet observe, that Swedish agricultural firms have become larger, regarding non-human factors. Two explanations for this are investigated: Economies of scale, defined as falling average costs, when production is rising, and the old system of support by the CAP, which was related to total production. The CAP support system is changing from production support to firm and income support. The future will show, whether Ecomonies of Scale (EOS) is the explanation of the growing Swedish farm size or not.