How to tell the direction of tree rings?

Sparse rings face south and dense rings face north.

The tree rings on the south side are sparse, because the sun and rain are richer than those on the north side, so the trees facing south get more nutrients and grow thicker, so the rings are sparse; Similarly, the north-facing side is blocked, the nutrient absorption in the south is insufficient, and the annual rings are denser.

If you don't find the cut tree, you can look at the bottom of the tree again. Usually, the shady side of trees is easy to grow moss, and that side is the north.

Extended data

Other ways to tell the direction:

1 Observe the sun

The sun rises in the east and sets in the west. Observing the sunrise and sunset can generally show a general direction (for example, at 6 o'clock in the morning, the sun rises in the east and the shadows of all objects fall to the west; By noon 12, the sun is due south and the shadow points to the north; At 6 o'clock in the afternoon, the sun is due to the west and the shadow points to the east. Therefore, the direction can be roughly determined by the shadows of the sun and objects. );

2. Branches and leaves of trees

The south side is lush and the north side is sparse;

3. Direct results

Put a pole on the ground. In the morning, the shadow points to the northwest, in the afternoon, the shadow points to the northeast, and the shortest shadow points to the north at noon.

Step 4 observe Polaris

At night, in the dark night sky, we always find the Beidou constellation shaped like a spoon. There is a bright star, Polaris, seven times from the end of the spoon, directly below, clockwise for east, south and west;