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Autumn 2021. Fenological observation

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Alvard Melkonian, modified 2 Years ago.
Jedi Master Posts: 47 Join Date: 2/19/21 Recent Posts
Hello, greetings from Ukraine (Poltava school #38). The research was conducted on September 22. The air temperature is 7 degrees with a plus sign, fog, cloudy, there are dry buds and branches on the trees. We chose two birches for the study because 2 teams work.
1 birch. color of 1 leaf -5 GY 7/12, 2 leaf - 5 GY 6/10, 3 leaf - 2.5 G 6/6, 4 leaf - 5 GY 5/10


2 birch. color of 1 leaf -5 GY 4/6, 2 leaf - 5 GY 4/6, 3 leaf - 5 GY 4/6, 4 leaf - 5 GY 5/10




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