Some factors influencing fruitfulness in apples
"SUMMARY AND CONCLUSIONS: Missouri apple yields tend to rotate in three year cycles, the sizes of the crops produced showing the following order: heavy, light, medium, heavy, etc. A five years' study of the behavior of individual apple fruit spurs of six commercial varieties, as contrasted with previous opinions based upon casual observation of the entire tree or entire orchard, leads to the- following conclusions: - Jonathan, Grimes and Winesap possess: the ability to develop a fairly high percentage of blooms each year, while Rome, York and Gano, produce an exceedingly high percentage of blooms one season and a very low one the next."--Text taken from page 1.
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