14-year-old Troy Edwards is now the rightful owner of a young cow. "It means a lot to me," Edwards said. "It means I can start my own herd and be able to breed beef cattle." Edwards won the young ...

That’s because an enzyme in cow pies liberates ammonia from the urea in urine, sending it into the atmosphere. This ammonia washes down with the rain, changing soil and water chemistry and leading to ...