Using Alfalfa horse feed as a soil amendment

[sirtanon]

As I've grown and become slightly more knowledgeable about growing tomatoes from year to year, I've gradually absorbed the notion of "Feed the soil, not the plant"..

Now, I still use Miracle Gro as a supplement at certain times, but I'm trying to become more "natural" in my approach to gardening. Manure, coffee grounds, banana peels, etc.. are all pretty obvious, as is standard compost, etc.. but as I've read more and more, I see threads about molasses, alfalfa, etc.. and it's gotten me to thinking.

...then I see this stuff when I'm at the local True Value/Ace store. This one by me sells horse and livestock feed, and I found this stuff simply called "Standard-Bread" which looks to be standard forage food for horses. As you can see in the photos below, the ingredients list is quite simple: Alfalfa hay, Cane molasses, Phosphoric acid.

Alfalfa - Check. Molasses - Check. Phosphoric acid? I would imagine that this would, at least in some way, contribute to the phosphorus content of the soil, which could be good too.. so.. Check?

- So my question is this. Has anyone here ever used, or known someone who uses this sort of horse feed as a soil amendment? How has it worked for you?