Which measure is most commonly used for purchasing trees today?

The most commonly used measure for purchasing trees today is weight. This is primarily because the weight of timber can directly correlate to its volume and the species type, making it a practical method for determining value. Specifically, weight allows buyers and sellers to easily assess the quantity of wood being delivered, facilitating straightforward transactions.

In the context of timber and lumber operations, weight measurements can also be more manageable than calculating volume or dimensions, especially when dealing with logs of differing shapes and sizes.

The other measurement methods, such as the Doyle log rule and the Scribner log rule, are specific to estimating the board feet in logs based on certain dimensions and shapes but are not as common today for purchasing trees. The cord is a measure used for firewood and is not typically employed for purchasing standing timber. Therefore, using weight stands out as the primary, widely accepted, and practical method in modern timber sales and purchases.