I was under the impression that they could get the necessary minerals from the subsoil...
John Polk wrote:
If for example, the plants absorbs 1,000 units of a given nutrient, and it is chopped/dropped there, it will give back some of that nutrient, perhaps 600 units. So your soil has a net loss of that nutrient, but it is now in the top soil, rather than deeper, where the beet couldn't reach.
John - could you please expand a bit more on why only some of the nutrients would be returned? If the nutrient is easily incorporated into volatile compounds such as carbon or nitrogen, I can see why some would be lost in decomposition. Otherwise it seems to me like most minerals would remain after full decomposition of the accumulator.
Adrien Lapointe wrote:There are many lists of dynamic accumulators online and in books, but I haven't seen one that says how well a plant accumulates a given nutrient. I would guess that some plants are superb accumulator for say potassium, but not as good for iron. Anybody has some information on that?