The inspectors for the State Plant Board shall obtain samples of fertilizer or fertilizer materials in the following manner:
(1) They shall draw samples with a core instrument that shall not be less than twelve inches (12") in length in a manner that will procure a representative sample from such shipments of fertilizer or fertilizer materials as they may be directed by the board or that they may find uninspected;
(2) Where there are ten (10) packages or less, they shall take samples from every package; where there are ten (10) or more packages, they shall take samples from ten (10) packages, plus a sample for each additional ton. In no case do more than twenty (20) packages need to be sampled;
(3) After thoroughly mixing the samples so drawn, they shall fill a container to be approved by the board with a portion of the mixed sample for chemical analysis or inspection; and
(4) Accompanying these samples, a report shall be made giving the name of the commodity inspected, number of packages represented by sample, the name of the manufacturer, the guaranteed analysis, the place where inspected, the date of inspection, and the name of the inspector.