John sent us this great FAO-published handbook on frost, freezing, and frost and freezing protection. Click on the link below to download.
UPDATE: Turns out that the PDF the FAO has posted on their website is incomplete — it is missing everything beyond Chapter 5. I’ve found a complete version of the handbook hosted elsewhere. If you downloaded the first version I posted, please replace it with the following:
Download
FAO: Frost Protection, Volume 1
FAO: Frost Protection, Volume 2
Also, you can read the full handbook online in English and in Spanish.