3.1.4 Data Needs and the Selection of Sampling Approaches

A number of crucial decisions must be made when ISM projects are planned. For example, it is necessary to determine the number and size of DUs, the number of replicate ISM samples, the number of increments making up each ISM sample, and the specific laboratory protocols required. Data needs are generally guided by the overall study objectives as outlined in Section 3.3. However, a fundamental challenge in planning sampling projects is that a sampling event often includes multiple objectives.