Jujube wood is generally more valuable than elm wood and poplar wood. This is due to its unique properties and historical significance. Elm wood, while durable and strong, is less sought after due to its limited availability and the preference for jujube wood in certain applications. Poplar wood, on the other hand, is the least valuable of the three due to its softness and limited uses.

Jujube wood is prized for its hardness, durability, and resistance to decay. It is often used in the construction of furniture, musical instruments, and architectural elements. The wood is also known for its beautiful grain patterns and rich reddish-brown color, which makes it highly desirable for decorative purposes. According to the U.S. Forest Service, jujube trees are native to China and have been cultivated for thousands of years, contributing to its cultural and historical value.

Elm wood is valued for its strength and workability, making it suitable for a variety of applications, including furniture, flooring, and construction. However, the Elm Tree has been affected by the Elm Disease, which has significantly reduced its availability. This scarcity has increased the value of elm wood, but it still does not match the demand and price of jujube wood.

Poplar wood is a softwood that is widely used for construction, furniture, and paper production. It is less expensive and more readily available than jujube or elm wood. However, its softness and lack of durability make it less desirable for high-end applications. The U.S. Forest Service reports that poplar is one of the most widely planted trees in the United States, which contributes to its lower value compared to jujube and elm wood.

In conclusion, jujube wood is the most valuable among the three due to its unique properties, historical significance, and limited availability. Elm wood follows closely behind due to its strength and workability, despite the challenges posed by the Elm Disease. Poplar wood, while useful, is the least valuable due to its softness and widespread availability.