The most destructive weather enemy in all fruit growing sections is the late spring frost which frequently occurs after warm weather has caused the fruit blossoms to become fully developed. The variation in severity of such frosts in mountain valleys is a phenomenon well known to the practical orchardist. The actual extent of this variation and the contributing causes have claimed only a very little attention from scientific workers in the mountainous regions. The present publcation is a preliminary report of investigations which were planned to measure the extent of such temperature variations, and acertain if possible some of the causes which bring about their occurrence.
Batchelor, L. D. and West, F. L., "Bulletin No. 141 - Variation in Minimum Temperatures Due to the Topography of a Mountain Valley in its Relation to Fruit Growing" (1915). UAES Bulletins. Paper 107.