I take this to mean that, while not poisonous, they are not palatable. Also, when it comes to eating off-beat foods, some people may have previously unknown allergies to the products and may be sickened by eating them. If you want peas in a pod, plant garden peas and leave the caragana pods on the bush. This time of year. When the garden is through for the season, turn under compost, peat moss, rotted manure and other material to improve soil texture.
Coarse sand is particularly helpful in our neck of the woods to aerate heavy compacted soils.
If salt is a problem, consider adding gypsum and if your soil pH is just too high for good crop growth, sulfur may be the answer. All of these are worked into the soil in the fall. And contrary to what you may have seen on the TV gardening shows, lime is not for everyone, especially here in Montana. Lime and wood ashes both raise soil pH and are recommended only for acid soils. Our pH here in most of the state is already too high and adding these materials will only make a bad situation worse.