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Autumn 2021. Birch tree

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Snježana Marković-Zoraja, modified 1 Month ago.
Jedi Master Posts: 45 Join Date: 8/26/12 Recent Posts
Hi from Karlovac, Croatia!
My students observed  two birch tree on October  4 th and 13 th. The results are the same.
BIrch 1.
All leaves:    5GY:4/8
Birch 2.
 1.leaf 5GY:5/10
2.leaf: 5GY:6/10
3. and 4 leaves: 5GY: 4/8
Air temperature:  12C

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