Those are the maximum amounts of irrigation water growers can apply 18 inches for cotton, corn, soybeans and grain sorghum and 36 inches for rice under the irrigation well permits granted them by the Mississippi Department of Environmental Quality. "I remember asking last year how many acre inches we can apply to corn, cotton and soybeans, and none of us knew," says Jason Krutz, irrigation specialist with Mississippi State University and a speaker at the Mississippi Delta Irrigation Summit held at Stoneville, Miss., Dec. 10. "That number is 18, and rice is 36." Krutz said few producers have probably looked for that number and few cared until now even though the amounts are specified on the well permits.