If you garden, tomato plants being set out love some dry milk in the soil. IIRC, it is the potassium.
I did that years ago. The dogs dug up my tomato plants and ate all the dirt mixed with milk. Thanks for the tip though. I had a white german shepherd years ago who used to eat all the ripe tomatoes off our plants. The next year we would have tomato plants growing all over the yards, gardens, fields, etc.....Obviously tomato seeds can survive the canine digestive system. As a matter of fact, those did better than the ones I planted. The dog was like Johnny Crapple-Seed.