Anybody have recommendations on purchasing kits to test for YAN? I'm looking to test in-house levels of YAN in our fresh sugarcane juice. I know it will vary by field, variety, harvest times, time since last fertilization, etc. I'm sending off for HPLC to establish a baseline but I'd like to get an idea of each field's N levels. I'm looking for solutions under $1k which I suppose would include sending off for lab testing.. This assay kit is where I'm at so far.
Thanks!