n Southern African Forestry Journal - Effect of planting depth on growth of open-rooted and seedlings in the United States : review paper

Volume 2003, Issue 198
  • ISSN : 0038-2167



Three studies in the Coastal Plain of Georgia were remeasured 7 or 8 years after planting to determine the effects of planting depth on field performance of open-rooted seedlings [root-collar diameter (RCD) ≥ 5 mm]. Average planting depth (i.e. shoot height before planting minus shoot height above ground after planting) for machine planted <i>P. elliottii&lt;/i&gt; was 14 cm while hand-planted <i>P. taeda&lt;/i&gt; seedlings averaged 9-11 cm deep. <i>P. taeda&lt;/i&gt; showed no adverse effects on growth when planting seedlings up to 15 cm deep. Data for machine planted <i>P. elliottii&lt;/i&gt; indicated that seedlings were planted 9 mm deeper on double-beds than on single-beds. Small-diameter pine seedlings (&lt; 5 mm RCD) were not planted as deeply as seedlings with large diameters (RCD > 5 mm). For <i>P. elliottii&lt;/i&gt; planted on double-beds, seedlings planted more than 15 cm deep had slightly smaller diameters at breast height than seedlings planted 10 cm deep. Although most tree planting guides recommend planting seedlings 7, 5 cm deep or less, many company plantations have been established by planting at greater depths.

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