Good tree growth last year allowed the trees to store up energy reserves and nutrients over the winter, resulting in robust leaf development this spring and summer, but this works the other way too... a bad drought one year can lead to poorer foliage the next.

William Keeton

William Tinsley Keeton (February 3, 1933 – August 17, 1980) was an American zoologist known internationally for his work on animal behavior, especially bird migration, and for his work on millipede taxonomy. He was a well-liked professor of biology at Cornell University in Ithaca, New York and author of a widely used introductory textbook, Biological Science.

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