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Natural improvement in black walnut stem form

: Natural improvement in black walnut stem form. Central Hardwood Forest Conference II Proceedings of a meeting held at Purdue University at West Lafayette, Indiana 47907, November 14-16, 1978: -400

Thirty-two 5- to 7-yr-old trees in S. Illinois, selected for type and severity of crooks up to 2.5 m above ground level, were measured and photographed annually from a fixed point. Av. deviation of stems from the vertical was orginally 30 cm, but only 13 cm after 3 growing seasons. Most trees showed a tendency for development of a strong central stem and more balanced crowns.

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