Part 1 — Notes to Chapter VII.
Reading edition
An admirable short account of soil in its relation to root-hairs is given in Sachs' Lectures, XV.; but for a more exhaustive treatment of the subject of soil the reader is referred to King, The Soil (Wisconsin, 1895), or Warrington, Lectures on the Physical Properties of Soil (Oxford, 1900); Larbalétrier, L'Agriculture (Paris, 1888), chapters II. and III. There is also a very good account in Bailey, The Principles of Agriculture (London, 1898), chapters I.-III.
With reference to the organisms in soils and the decompositions they bring about, the student should consult Kramer, Die Bakteriologie in ihren Beziehungen zur Landwirthschaft (Wien, 1890), and Lafar, Technical Mycology (Engl. edition, 1898), sections V., VIII., and IX.