How many Toona sinensis trees are there on the ancestral grave?

This tree species Toona sinensis grows well in limestone area, and can be used as afforestation tree, landscape tree and street tree in limestone area. Wood is yellow and white, which can be used to make farm tools and vehicles; Leaves can be fed to Toona sinensis (wild silkworm); Fruits can be used as medicine, which is equivalent to clearing heat and promoting diuresis, astringing and stopping dysentery; Seeds contain 35% oil. This species reproduces itself in many cities in North America, Europe and Asia and becomes a "weed tree".

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Toona sinensis has strong resistance to pests and diseases. The common disease is powdery mildew. Silkworm moth and castor silkworm are the main leaf-eating pests, which harm seedlings. Cicada is a common sucking pest. Weeping weevil and weevil are common dry pests.

It can be planted in winter and spring, and it is easy to plant seedlings in early spring. The survival rate of seedlings is the highest when the upper dry buds expand into spheres. Plant it bigger, deeper and less exposed. Greening in arid or windy areas is easy to be cut off. Commonly used "four sides" planting. Generally, strong seedlings or 3-5-year-old young trees are planted, and they are watered in time after planting to ensure the survival rate.