Managements refers to something that occurs at a specific time and has a quantity; Managements include actions that are done to a plant or ecosystem, for example the planting density or rate of fertilization. Managements are distinct from Treatments in that a Treatment is used to categorically identify an experimental treatment, whereas a management is used to describe what has been done.
Managements are the way a treatment becomes quantified. Each treatment is often associated with multiple managements. The combination of managements associated with a particular treatment will distinguish it from other treatments. The management types that can be entered into BETY are described in tab:mgmttype.
Each management may be associated with one or more treatments. For example, in a fertilization experiment, planting, irrigation, and herbicide managements would be applied to all plots but the fertilization will be specific to a treatment. For a multi-year experiment, there may be multiple entries for the same type of management, reflecting, for example, repeated applications of herbicide or fertilizer, for example see fig:trtmgmt.
note: At present, managements are recorded for Yields but not for Traits, unless specifically required by the data or project manager.
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To associate a management with multiple treatments, first create the management, then edit the management and add treatment relationships.
David 2011-10-07