Question

The expansion of the cattle industry was a significant change for the relationships of ranchers and farmers. Ranchers supported the idea of the open range, where cattle were free to roam the countryside. Farmers did not want cattle on their land because the cattle destroyed their crops. Farmers began fencing off land to prevent the cattle from coming on to their property.
The relationship between ranchers and farmers changed significantly with the invention of

Answer 1

Barbed wire is your best bet.

Before, ranchers and farmers did their thing on huge plots of land. Wayward cattle often cause problems for both ranchers and farmers. For farmers, the cattle could come in and eat crops. For ranchers, cows could disrupt cattle raising and cattle driving.

When barbed wire was invented, many took they opportunity to fence off plots of land for their own use, signifying ownership of property. Ranchers and farmers often fought with each other for property, since both would need a large plot of land to do their thing.