Agriculture and farming versus Agriculture

Why do we have these two different tags?

Could someone motivate their differences?

Farming includes livestock & poultry production.

Agriculture don't always include livestock or poultry production.

Aidan.

I made the post since I have this concept of agricutlure, see e.g.,

https://www.britannica.com/topic/agriculture

https://www.merriam-webster.com/dictionary/agriculture 

this is not my personal opinion, but the standard meaning of Ennglish

Maybe agriculture and livestock is better description for this tag?

There seems to be some misunderstanding here. 

We have only one tag, called Agriculture. In the tag description, it says agriculture and farming, but that is all.