DES MOINES, Iowa (AP) — A voluntary state program that aims to improve water quality practices at farms around Iowa is entering its fourth year amid growing differences about the best ways to clean up the state’s waterways. The Iowa Department of Agriculture and Land Stewardship has announced the sign-up period is open for its cost-share program that allows farmers to offset the expense of implementing some water quality practices. The money will be available in July.

The agriculture department says the program is among several water quality initiatives. Some agriculture experts say it’s not enough for long-term benefits. The Iowa Legislature failed this session to figure out a sustainable funding source for water quality initiatives. There is also tension over whether cleanup efforts should include regulation or expanded voluntary efforts like the cost-share program.