The Cooperative Extension Service shall compile or require to be made such reports as it determines to be necessary or proper in order to ascertain whether any plans provided for in this article are being carried out according to their terms. The Cooperative Extension Service shall provide for compliance with such requirements on the part of all persons and agencies participating in the administration of any such plan and may make or cause to be made such investigations as it determines to be necessary or proper to assure the correctness of such reports and to make possible the verification of the reports.