Note 59 — Chapter VII · THE MINERAL CONSTITUENTS OF THE SOIL SOLUTION.[40]
Reading edition
For the literature of the earlier work on the composition of aqueous extracts of soils, see: How crops feed, by Samuel W. Johnson, 1890, p. 309 et seq.; see also. On the analytical determination of probably available “mineral” plant-food in soils, by Bernard Dyer, Jour. Chem. Soc. 65, 115-167, (1894); and Soils, by E. W. Hilgard, 1906, p. 327 et seq.