Branches

Literature Cited

1. ↵
   1. Shigo, A.L.,
   2. N. Rogers,
   3. E.A. McGinnes, and
   4. D. Funk

   . 1978. Black walnut strip mine spoils: Some observations 25 years after pruning. USDA For. Serv. Res. Pap. NE-393. 14 p.
2. ↵
   1. Shigo, A.L.,
   2. E.A. McGinnes,
   3. D.T. Funk, and
   4. N. Rogers

   . 1979. Internal defects associated with pruned and nonpruned branch stubs in black walnut. USDA For. Serv. Res. Pap. NE-440. 27 p.