Earlywood / Springwood - In cross section, earlywood or springwood is the xylem which has become lignified (has become wood) in the spring. It precedes the Late or Summerwood. It is the first wood to be formed in the current growth increment. In girth we break down the current growth and lignifications into two periods - Early and Late, or as some label it - Spring and Summer. Remember the cambium zone does not produce wood on the inside, but, xylem. The new born material is not correctly termed wood until it is lignified.
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See "Latewood" or "Summerwood".
See TREE ANATOMY, SHIGO, 1994
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