The Iowa Department of Public Safety’s narcotics division is trying to keep the spring planting season from becoming the seed for new meth labs. The Public Safety Department is working with the Iowa Agriculture Department to distribute brochures that tell retailers, storage facilities and farmers how to protect their supply of anhydrous ammonia. Special Agent Dwight Wrightsays anhydrous is a key fertilizer applied in spring by farmers, but it’s also one of the ingredients used to cook methamphetamine. Wright says keeping the anhydrous from being stolen should help keep down the amount of meth made in Iowa. Wright says this is the time of year when anhydrous is most available to thieves. Wright says the anhydrous brochures are going outthis week.