(a) It shall be the duty of the Commissioner to sample, inspect, make analyses of, and test fertilizers distributed within this state and inspect the storage of bulk fertilizer at any time and place and to such extent as he or she may deem necessary to determine whether such fertilizers are in compliance with the provisions of this article. The Commissioner is authorized to enter upon any public or private premises or carriers during business hours in order to have access to fertilizers subject to provisions of this article and the regulations pertaining thereto, and to the records relating to their distribution and storage.

(b) The methods of sampling and analysis shall be those adopted by the Commissioner by regulation.

(c) The Commissioner, in determining for administrative purposes whether any fertilizer is deficient in plant food, shall be guided by the terms "lot" and "official sample" as defined in paragraphs (17) and (19) of Code Section 2-12-2.

(d) The results of official analysis of fertilizers and portions of official samples shall be distributed by the Commissioner as provided by regulation. Official samples establishing a penalty for nutrient deficiency shall be retained for a minimum of 90 days from issuance of a deficiency report.