木の根はどこまで伸びるのでしょうか?
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イロハモミジには外来種の根があるのでしょうか? - イロハモミジ
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イロハモミジの病気診断。投げるかおやつにするか?
Plant Trees Like An Arborist- Avoid This Common BIG MISTAKE!
I Cut My Plant’s Roots In Half...And This Happened
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How to plant a tree so that it grows 3 times faster. Root training method.
樹木医の企業秘密 - 2 倍の速さで成長する木を植える方法!
Plant Bare Root Trees This Way to Grow Strong Trees
イロハモミジの枯れと病気
Are Tree Roots Really Damaging Foundations? - Foundation Repair Tip of the Day #175
Girdling Roots on a Maple Tree
Tree Root Trouble
Propagating Japanes maple using airlayers
Deep Root Watering Tool - How to Water Your Trees & Shrubs
Ask an Arborist: How do I Avoid Damaging my Tree’s Roots?