변재
나무껍질 아래의 비교적 어린 바깥쪽 목재로, 물과 녹은 무기질을 나무 위쪽으로 운반한다.
Sapwood in a young black walnut trunk cross-section (Juglans nigra)
모든 언어
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참고 자료
- US Forest Products Laboratory Wood Handbook — sapwood is the active water-conducting, lighter-colored wood adjacent to bark
- USDA Forest Service technology-transfer sheet — black walnut sapwood is nearly white and contrasts with chocolate-brown heartwood
- University of Illinois Extension — eastern black walnut commonly has ten to twenty annual growth rings in its sapwood