What is the best size for planting aeolian fossils under the mountain?

It is best to plant 3-7 mm aeolian fossils in downhill piles.

According to the official data of China Science Popularization Network, the aeolian fossils are 3-7mm. For planting piles with good soil quality and many weathered fossils, fine particles sliding down the slope are selected, and semi-burnt coal balls are added to make piles planted down the mountain, which not only takes root, but also drains water.

Aeolian fossils, also known as tortoiseshell, are composed of gravel heads with mixed colors and vertical and horizontal grooves.