There is only one type of fertilizer (fishmeal) / "training food" (krakka root). Yet when using them we have to select them every time. That is an unnecessary hassle. With crafting the mats are picked automatically as well after all.
So make it so that as long as you have the item in your inventory it happens automatically instead of the inventory opening and having to pick it and use it.
Small thing, but removing a pointless little hassle from the game.