How many pounds can one oxen pull?

I'm curious to know, what is the maximum weight that a single oxen is capable of pulling? It's an intriguing question, as oxen have been known for their strength and ability to work under heavy loads for centuries. Could you elaborate on the factors that might influence an oxen's pulling capacity, such as its breed, age, and physical condition? Additionally, are there any records or studies that have been conducted to determine the maximum weight an oxen can pull? I'm eager to learn more about this fascinating aspect of oxen's capabilities.