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Which direction does the denser side of a large tree's growth rings face, and what can growth rings tell us?
Which side do the denser growth rings of a large tree face, and what can growth rings tell us
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Rare Large Stand of Endangered Natural Yew Trees Discovered in Zhashui, Shaanxi
A rare large stand of natural yew trees, numbering more than 100,000, has recently been discovered in Zhashui County, Shaanxi, which is located in the Qinling Mountains. Some experts say that the yew is an endangered tree species preserved from the Quaternary glacial period, and that the extensive area and large number of this natural yew forest are rare. It is understood that Zhashui is located on the southern slope of the Qinling Mountains, in the transitional zone between the subtropical and warm temperate zones, with abundant rainfall and a forest coverage rate of 78 percent. It is rich in plant resources and has been known since ancient times as a "natural medicine storehouse." In Dongyuan Gully, Fenghuang Town, a yew was once found with a trunk circumference of 2.18 m, a canopy covering half a mu of land, and an age of more than 1,900 years.
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Detailed Explanation of Key Techniques for Transplanting Large Red Spruce (Picea koraiensis) Trees
Red spruce, also known as Tiger-tail Pine, Korean Spruce, etc., is an evergreen tree of the genus Picea in the family Pinaceae. It is native to Northeast China and Korea, and is now widely planted in the Beijing and Qingdao areas, with some distribution in the Northwest as well. This tree species has a graceful form, with a spire-shaped crown and large branches that spread horizontally or extend slightly at an angle; it is highly adaptable, with a shallow root system and well-developed lateral roots, making it relatively easy to survive after transplanting. I. Transplanting Time: Spring is the best time for transplanting large trees. Under complete technical measures, transplanting in late November and late May can both achieve a survival rate of over 98%. II. Transplanting Preparation
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