One point the 1990 Farm Bill specifically highlights is the use of natural cycles and controls when possible, instead of relying on precious resources to do the same task.

Biological

Explanation:

In the reading it states,

"Make the most efficient use of nonrenewable resources and on-farm resources and integrate, where appropriate, natural biological cycles and controls"

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.