Boxed-heart Splits in 4/4 Douglas Fir

[robertw]

We are seeing an increase in Boxed-heart splits in our 4/4 Douglas fir and I know it is extremely hard to prevent this type of defect, but was wondering if anyone out there has come up with a method of diminishing the chances of this happening. We are using a standard 80 hour schedule with an ideal target moisture content of 18%-19%.