These are some good defs of baiting and scents. (From Wis. DNR)
What exactly is considered bait?
Bait is any material that is placed or used to attract wild animals, including scent
materials, salt, minerals, grains, etc. Water is not considered bait.
What is considered a scent material?
Scent is any material, except animal parts or by-products, used to attract wild animals
In areas where deer baiting is not allowed, what CAN I USE to attract deer
closer to my stand if I cant use bait?
Use of the following are legal statewide:
Decoys
Scents
Naturally occurring material (such as acorns), deposited by natural vegetation, that
is not collected and relocated in any manner.
Crops planted and left standing as wildlife food plots.
Material deposited solely as a result of normal agricultural or gardening practices
and not collected and relocated for hunting or other purposes.