No. It just made it easier to control the oxen as they were being used to plow fields and for the oxen to pull the plow, and it made it more efficient to be able to use more than one ox to use for plowing. But it never made oxen plow fields faster than horses do. Horses are always going to be faster and more high-stepping than an ox will ever be.
oxen, slaves
They used beasts of burden (horses, mules, oxen, etc.) to pull their plows.
To pull heavy wagons, plows and things like that.
Farmers used mules to pull the implements such as plows.
Tractors, locomotive engines. Oxen, curiously, push plows even though they are in front. This is due to the design of the harness.
Oxen
Farmers in ancient used a team of oxen to pull the plough or a farm cart. Sometimes they used slaves to pull the plough perhaps six slaves replacing a pair of oxen. Often the slaves went naked.
Yes, they did contribute to the development of agriculture. For example, horses and oxen were used to pull plows before it became mechanized.
Bulls can become oxen when they get castrated and are trained to pull carts, wagons, plows, etc. However most breeding bulls stay bulls, and oxen are trained at a young age, when they are castrated when they are on their mommas and not yet trained as oxen.
Tractors normally pull ploughs (plows).
A yoke is generally used by farmers to pull a group of oxen together, helping them pull a load of whatever is needed, hay, people, corn, etc. They are generally not used in many places anymore though.
One can legally own a carabao as a pet in the Phillipines. The carabao is used by farmers to pull plows in the rice fields.The carabao is also used to pull transportation carts.