“Plant Performance, and Seasonal Soil and Foliar Nutrient Variations in an Organic Apple Orchard under Four Ground Cover Management Systems”. Journal of the American Pomological Society 65, no. 3 (July 1, 2011): 130–146. Accessed February 5, 2026. https://journal.americanpomological.org/index.php/jofaps/article/view/2769.