Poland's accession to the European union was connected with the acceptance of new conditions for the functioning of agriculture, while the incorporation of producers into the Single European Market and the adoption of principles of the Common Agricultural Policy were associated with hopes for the acceleration of transformation in agriculture. Since agriculture is first of all a real sphere of economy, it has been required to assess the effect of the integration process on production and economic results. Research results show that integration with the EU had an effect on an increase in the volume of agricultural output. With the moment of accession an increment of agricultural entrepreneurial income was observed, which doubled (in terms of constant prices). This effect was to a considerable degree caused by an increase in the subsidies. Static (comparative) analysis confirms a defective agrarian structure. A consequence of high labour resources in Polish agriculture, considerable land resources and low capital outlays in relation to the relatively low production output is the low productivity of land and labour resources.