Chautauqua Institution, The Chautauquan, Vol. 05, March 1885
“ The root crops, for example, are naturally plants of two year’s duration. The first season is spent in gathering and storing up substance in a large root. During the following year the starch, sugar, oil, etc., is withdrawn and used in the production of a flower-stalk, upon which the crop of seeds is finally borne, and after this the plant dies.Turnips are mainly grown as a second crop, following early potatoes, etc. The soil should be made fine and rich before the seed is sown. ”
