Whenever a new product or practice is introduced, you usually can hear many widely different opinions about it- good and bad. Your problem: to separate fact from fancy. The information in this article may help.
Stritzel, J. A. and Duncan, E. R.
Iowa Farm Science: Vol. 8
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol8/iss1/4