An edition of Campbell's 1907 soil culture manual (1907)

Campbell's 1907 soil culture manual

a complete guide to scientific agriculture as adapted to the semi-arid regions : the proper fitting of the soil for the conservation and control of moisture and the development of soil fertility ; how moisture moves in the soil by capillary attraction, percolation and evaporation ; the relation of water and air to plant growth, and how this may be regulated by cultivation

By Hardy Webster Campbell