In farming professions, the question of training for care of the environment has to address the complex nature of the relationship between farming and the environment together with the objectives of professional training. Using the example of a farming task, maize weeding, the author points out the particularities of decision-making on a farm. The consequences for professional training are teaching in complexity and training for professional action. In this context, training for care of the environment can only be effectively incorporated into farming practices if training methods propose a pragmatic approach.