According to the regulation 571/88 from the European Council and Parliament the EU Member States must realize 3 farm structural surveys (1993, 1995, and 1997) between two successive agriculture censuses.
The objectives of the publication containing the results of Farm Structure Survey - 1993 are:
- to provide data on the farms' structure and evaluate its evolution since the 1989 agriculture census;
- to provide data about the evolution of the agricultural production methods;
- to characterize farm labour force and agricultural population.
Instituto Nacional de Estatística - Inquérito à Estrutura das Explorações Agrícolas : 1993. Lisboa : INE, 1995. Available at www: <url:https://www.ine.pt/xurl/pub/70770815>. ISSN 0871-8040