A great reply, and very informative to our members. Did this come off your head, or did you look up. Doesn't matter, a great reply!!
Calcium cyanamide, educate me!
I assume you mean below 50 degrees soil temperature the microorganism become inactive, and any win in uf is basically unavailable.
HWIN fraction in uf usually breaks down in 1 yr, but a very small amount can take years!
Timothy J Murphy Specializing in Quality Turf
Bs in Plant and Soil Science
Almost 40 yrs exp., 20 as GC superintendent
Primarly work with cool season turf