N.J. Stat. § 4:16-25: Selection of farms for demonstration

The director of the extension service shall select for purposes of demonstration, farms in the various counties of this state which are most convenient of access to the majority of the farmers of such counties, the owners of which consent thereto and agree to co-operate in such demonstration work. The work upon any particular farm may be abandoned at any time it becomes evident that the work upon that farm fails to produce the proper results.