Ida D. Bennett, The Busy Woman's Garden Book
“ Any soil that is not virgin soil—soil that has never been used, and that sort of soil is not available in towns and villages if, indeed, it is anywhere in an old, settled country like ours—must have returned to it, year after year, an equivalent of the fertility extracted from it in growing the previous season's crop. It may be that the loss of many seasons must be made good, it may be that the soil was originally deficient in many, or only one, of the elements that make fertility;65 probably it will lack that most important element of productive soil—humus. ”
