However, what was developed as a lab test for fermented corn is now being used as a tool for fresh silage. Recent ongoing research and field data has substantiated that with time and fermentation, the KP score will rise approximately 5 to 10 units. While fermentation may not rescue poorly-processed corn silage (a 60 or lower processing score), it plays a key part in boosting starch digestibility over time. Kernel maturity (moisture) and endosperm characteristics are also key factors.