Agronomists and ecologists need each other and can learn from each other: agriculture cannot ignore ecological facts, neither can ecology study and conserve ecosystems without understanding contemporary agriculture. With this intention a symposium was organized on -the ecological implications of contemporary agriculture-. Five major groups of problems were discussed, related to major elements of the system, each corresponding to a session of the symposium:

- the soil and its life;
- the plants, especially the unwanted ones;
- the fauna, with emphasis on the control of pests;