Only if she's in heat and is desperate for a bull to settle her. Otherwise, if she's not in heat or pregnant, she will not be actively looking for or trying to attract a bull to breed with her.
As often as possible and as often as there are cows that are needing his services. That said, a bull can breed as many as 2 to 10 cows (or more) per day, depending on how many cows are in heat on that day.
To breed the cows. Bulls, when it is time to cull them, are then turned into beef.
No. Bulls are supposed to breed cows, not kill them.
A 20 month-old bull should be able to breed around 10 to 30 cows in a breeding season. The most may be 40, but that could be pushing it.
The past of the word breed is bred. You can say something like "The bull has been bred in the past" or "We bred the bull to all of the cows to produce superior stock".
Cows will show signs of heat cycle (they will bellow, they will mount or stand for mounting), the bull will smell that she is in heat (often the cow will urinate and the bull will smell the urine-this is referred to as the Phleaman response). They will then breed.
Friesian cows breed through natural mating, where a bull is introduced to a female cow in heat for mating. Alternatively, artificial insemination can also be used, where semen from a Friesian bull is collected and artificially inserted into the female cow's reproductive system to achieve pregnancy.
It's probable that they just turn the bull loose with them and let him do his thing.
A popular choice for breeding with Angus cows is a Charolais bull. Charolais bulls are known for producing calves with good growth rates and carcass quality, which complements the Angus breed well. Other suitable breeds for crossbreeding with Angus cows include Hereford and Simmental.
Cows do not have sheaths because they do not have a penis. Cows are mature female bovines that are capable of giving birth to a calf. A bull, on the other hand, has a penis that is used to breed cows. The sheath on a bull is located on the underline of the belly.
If she's in heat, most definitely. Often a bull will go look for the cow that is in heat, no matter if he's the neighbor's bull or not.
It all depends on how many cows a bull has to settle in one day and how much libido the bull has. It should be safe to say that a bull may mate with one or more cows at least 10 to 20 times a day. If a bull has a lot of cows to breed, there's no time for eating, but lots of time for courting.