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Water was applied at flow rates of 0, 3.8 and 7.6 liters per hour (0, 1 and 2 gph) and nitrogen (N) was surface applied at 50, 100, 200, and 300 kg/ha (45, 90, 180 and 270 lbs/A) in 1981 and 1982 to Acer rubrum (L.). Tree height, trunk caliper and root dry weight within an AAN specified size were greater with trees grown with 3.8 l/h (1 gph) compared to non-irrigated trees. Tree height and trunk caliper were not affected by N rate. Nitrogen rate influenced root growth. Roots of red maples grown with 3.8 l/h (1 gph) and 200 kg/ha (180 lbs/A) of N were more concentrated under the tree.

Influence of Trickle Irrigation and Nitrogen Rates to Acer rubrum L.