Little Masterpieces of Science…
“ When we see how important as signs of water many plants can be, why may we not find other plants denoting the minerals which they especially relish as food or condiment?Of more account than gold or silver are the harvests of wheat and corn that ripen in our fields. There the special appetites of plants have much more than merely curious interest for the farmer. He knows full well that his land is but a larder which serves him best when not part but all its stores are in demand. Hence his crop “rotation,” his succession of wheat to clover, of grass to both. ”
