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http://cereals.ahdb.org.uk/media/268962/pr520.pdf
The above link, if it works, describes how stirrers can actually slow down drying.
In a nut shell it says that by not stirring you leave the grain with the most moisture at the top and as the air passes through the wheat it can keep picking up more moisture, therefore taking more moisture out per hour.
I have also been told that stirrers can eventually cause problems by creating small bits that partially block drive-on floors.
The conclusion seems to be stir once to loosen up the heap and then once again after you are happy with the average moisture.
The above link, if it works, describes how stirrers can actually slow down drying.
In a nut shell it says that by not stirring you leave the grain with the most moisture at the top and as the air passes through the wheat it can keep picking up more moisture, therefore taking more moisture out per hour.
I have also been told that stirrers can eventually cause problems by creating small bits that partially block drive-on floors.
The conclusion seems to be stir once to loosen up the heap and then once again after you are happy with the average moisture.