HOFIX “FERTILIZATION” AFTER PATCH 1.5.1 FS17 – LS 17
Before the patch you could use the following procedure for 3 stages of fertilization:
harvesting > fertilization > cultivation > fertilization > sowing > fertilization
After the patch, you will only get to two levels of fertilizer.
I have created a mod as a workaround.
I only tested it with a fertilizer spreader.