(a) The commissioner of natural resources must require state cooperative farming agreements and agricultural leases of lands administered by the commissioner located east of Interstate Highway 35 in the karst region of the state to:
(1) prohibit application of fertilizer in the fall;
(2) require that no more than 50 percent of the nitrogen budget may be applied before crop emergence;
(3) prohibit nitrogen application rates from exceeding the University of Minnesota recommendations on rates; and
(4) require the use of fall cover crops.
(b) The commissioner must evaluate existing food plots and establish a process to retire food plots on lands administered by the commissioner that do not have a significant value to resident and migrating wildlife.