In order to describe soil degradation, it is necessary to establish common soil descriptors that can be measured or estimated. Even if there is significant variability between soil types, climatic conditions and land uses, current scientific knowledge allows the setting of criteria at Union level for some of those soil descriptors. However, Member States should be able to adapt the criteria for some of those soil descriptors based on specific national or local conditions and to define the criteria for other soil descriptors for which common criteria at Union level cannot be established at this stage. For those soil descriptors for which clear criteria that would distinguish between healthy and unhealthy soil condition cannot be established at this stage, their monitoring and assessment will facilitate the possible development of such criteria in the future.
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