Bread From Stones - J Hensel

It is in true scientific sense that we have been making 'bread from stones' as the biblical allegory intimates, but not by a momentary miraculous process. Our heritage of soil fertility accumulated in ages past has telescoped the time lapse between bread from stones to bring these two close together. With the squandering of our soil fertility by continuous crop removal and insufficient  fertility return, the distance between bread and stones will not be bridged by the best of science. If our soil fertility decline is to go much further we shall wish for some miraculous power by which we may quickly convert stones into bread.

- William A. Albrecht (College of  Agriculutre, University of Missouri)