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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 22, Number 2 (1971) → The Effect of Late Summer Irrigation on Red Pine Buds and Shoot Lengths

The Effect of Late Summer Irrigation on Red Pine Buds and Shoot Lengths

Red pine (Pinus resinosa Ait.) completes its height growth by early summer and begins to set buds in midsummer. This paper shows that irrigation, as opposed to drought, during the period of bud growth results in larger shoots that emerge from the buds the following year. The Experiment The experimental procedure was described in detail earlier.1 In brief, there were 60, 5-year-old red pines averaging 33 cm. in height growing in clay pots. In 1963, the following three treatments were employed: frequent watering-about 35 mm. equivalent rainfall once a week; infrequent wateringabout 35 mm. equivalent rainfall every 2.5 to 3 weeks; and droughtno water added after start of the experiment. These treatments began July 23, and for convenience were termed : wet, intermediate, and dry.


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Author(s): John R. Clements

Publication: Tree Planters' Notes - Volume 22, Number 2 (1971)

Volume: 22

Number: 2