'l'he feeding of iodine in the form of potassium iodide to young growing swine in dry lot and on rape pasture resulted, in three separate experiments, conducted in three different years, in increasing tile average ' daily gain approximately 10 percent, and likewise in decreasing the feed required for one hundred pounds of gain 10 percent.
The pigs receiving potassium iodide made greater dimensional growth in height, in length, and in leg circumference.
Evvard, John M. and Culbertson, C. C.
"Studies in iodine feeding, Part I—potassium iodide feeding beneficial to young swine,"
Research Bulletin (Iowa Agriculture and Home Economics Experiment Station): Vol. 6
, Article 1.
Available at: https://lib.dr.iastate.edu/researchbulletin/vol6/iss86/1