Why is it a best practice for an organization to document its backup and recovery steps for disaster recovery?

That way you keep history of what was done when, and if need be, you can choose different points in time where you want to go back in order to ensure that your goals are fulfilled. 

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.

The answer is congress