After the afforestation in the sand, with the growth of the forest, not only the wind erosion is reduced, the litter is increased, and the wind and sand are changed to change the environment. At the same time, forest products are gradually being offered. The 10 to 12-year-old Pinus sylvestris var. mongolica growing on gently fixed sand is pruned and thinned, with 18,000 to 20,000 kg of burnt material per hectare and 450 to 640 coffins (4-5 cm in diameter and 1-1.5 m in length). In the case of 2000-2300 plants per hectare in 20-23 years, 650-840 small rods (8-10 cm in diameter and 4-5 m in length) can be produced in thinning, and the average DBH of the standing trees after thinning is 11.6 cm. It is 8.2 meters high and has a volume of 76.6 cubic meters per hectare.
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