Fall is a great time to evaluate your Alfalfa stands. Using a 2-square-foot section count the stems that are tall enough to be harvested by the mower. Here are some pictures of my work assessing the stand and root health.  Here is link to an article that will explain the process in more detail: https://fyi.extension.wisc.edu/forage/alfalfa-stand-assessment-is-this-stand-good-enough-to-keep