E Pfeiffer, _Soil fertility, renewal & preservation: bio-dynamic farming and gardening_:
Brehmer reports that potassium in the vicinity of potatoes --- separated by an air space from the containers in which the plants are growing --- was able to increase the growth and the potassium content of the potatoes. Stoklasa shows that potassium (in sealed test-tubes hung over growing plants) alters the rate of growth of the plants. We should like to add that we have been able to make this experiment, the validity of which we are able to confirm by having obtained corresponding results. Ried shows that the presence of potassium and other salts in the vicinity of animals can have a far-reaching influence on their growth and above all on their reproduction. And there are numberless experiments which demonstrate the influence of irradiated and non-irradiated metals, in their effects at a distance upon the development of bacteria cultures.
Has anyone tried this recently?