Use a fill-in value for Mean Annual Temperature that is compatible with database columns new type (numeric(4, 2)).
Change new and edit templates to use instance variables @sites and
@treatments in place of @citation.sites and @citation.treatments, and
change the controller actions that render these templates to always
supply these variables.
Change the label on the feedback_text control from Description to
Details so it doesn't conflict with the several object-editing forms
that also have a control labelled "Description".