Sustainable management permanent grasslands.

The Natural complete ecosystem, the original form of development of human society has changed due to the adoption of diversified development options, mainly oriented towards production systems designed to erode the harmony between man and nature. As a consequence of these changes, we are witnessing today an increase of the probability of manifestation of nuisance factors, namely harmful and the vulnerability of human society to their action. The global reaction to this situation, though delayed, is notable and oriented towards the adoption of specific actions intended to produce change towards a environmentally friendly economy. This change, called sustainable development, is a topical issue of maturity and depth and this paper highlights the necessity to successful management of resources for grassland agro ecosystems in order to meet people's changing needs, while maintaining or improving the quality of the environment and conserve natural resources.