“The Influence of Nitrogen Fertilization, Season of Application, and Orchard Floor Management on Fruit Quality and Leaf Mineral Content of ’Golden Delicious’ Apple Trees”. Journal of the American Pomological Society 46, no. 2 (April 1, 1992): 71–75. Accessed January 30, 2026. https://journal.americanpomological.org/index.php/jofaps/article/view/1963.