“Optimum Ranges of Leaf Nitrogen for Yield, Fruit Quality, and Photosynthesis in ‘BC-2 Fuji’ Apple”. Journal of the American Pomological Society 55, no. 2 (April 1, 2001): 68–75. Accessed February 5, 2026. https://journal.americanpomological.org/index.php/jofaps/article/view/2433.