Attached are the WHOLE-PLANT-MOISTURE results from the Corn Silage Burn-Down event held Friday September 8th, by All-American Co-op Progressive Ag Center in Plainview, MN. We ended up chopping and testing 106 samples … a new ALL-TIME record!! In my tenure of keeping record of this information for these events dating back as far as the summer of 2008, this is the highest number of samples we’ve ever recorded at 1 event, eclipsing our previous Record of 97 again at the Plainview location on August 22nd, 2012!
- Overall average moisture of 75%, with a range from 72 to 80%.
- NO samples fell into a range of 63 to 68%, which is generally considered
The “optimum harvest moisture target range”.
- Kernel maturity was at least 75% milk-line on 80% or more of the samples, With only 2 samples showing some “denting”.
In contrast the results from our event in Plainview yesterday are as follows:
- Overall average moisture of 71%, with a range from 65 to 78%.
- 17 samples or 16% of the total samples fell into the range of 63 to 68%,
Which is generally considered the “optimum harvest moisture target range”.
- Kernel maturity was 50% milk-line or slightly less in most cases, with “denting” occurring in almost every sample.
So in analyzing the differences between the 2 events (August 25th to September 8th) we can see an overall average moisture change of 4% in 14 days. This equates to an AVERAGE-DRY-DOWN-RATE of slightly higher than 1/4 (0.25) % per day. Certainly this is not a very high DRY-DOWN, but is probably expected considering the cooler weather Pattern. With the current weather forecast showing some advancement in temperature and also the current advancement in “kernel-maturity” we should see DRY-DOWN Pick up to about ½ (0.50)% per day in the next 10 days. Therefore I would expect that the largest portion of Corn intended to be harvested for Silage takes place in the next 7-10 days, with the exception of that which is stored in Silo’s or severely late plantings.
It is also interesting to note the statistic I mentioned about 17 samples (16% of the total samples) falling into the “optimum harvest target moisture range”. As I look back on previous years I’ve noticed that once this number gets close to 25% the timing of recommended harvest is within about 1 week! Obviously the more samples we check the more accurate this recommendation becomes.
Thanks again to EVERYONE who helped with this event. It takes a lot of people working together & dedicated to this industry that we all love. Hopefully the information we gain from this and what I have provided you here is helpful and puts our customers on the road to a successful Corn Silage harvest!!
Please let me know if you have any other questions or if I can be of assistance in any other way.
Robb D. Wock
Dairy Production Consultant
Purina Animal Nutrition LLC