Series: FAO Plant Production and Protection Papers

This publication deals with the study of extensive grazing lands and forage production systems and the assessment of grassland conditions and productivity. Although a complex subject, it is a very necessary one for the correct management of grazing lands and the design and execution of projects to improve sustainable extensive livestock production and enhance the living standards of traditional herders.

Modelling is emphasized as a powerful tool for dealing with the complexities of the pastoral system. A computer-based model is described that has been designed specifically for use in pastoral development programmes and that aids managerial, policy and development decisions, primarily by analysing land and forage resources for their productivity and livestock support capacity, taking system complexity into account.