Abstract
In the spring of 1993, red oaks (Quercus rubra) and `Red Sunset' red maples (Acer rubrum cv. `Red Sunset') were propagated from seed and microcuttings, respectfully. From June through October, plants were fertilized twice daily with 1.4 liters of fertilizer solution at concentrations of 0, 25, 50, 100, 200, or 400 ppm nitrogen from a 20-10-20 water soluble fertilizer. Destructive harvests were conducted six times at intervals from June through December. Leaf area, stem height, root length, root area, and dry weights of roots, stem, and leaves of harvested plants were measured and tissue nutrient concentration analyzed. Nutrient analyses of roots, stems, and leaves show seasonal distribution patterns of nitrogen. Dose- response patterns of fertilizer rate and growth were identified throughout the growing season.
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