Livres associés

Dry farming in Oregon

Dry-farming:

Dry-farming : a system of agriculture for countries under a low rainfall

Dry-farming a system of agriculture for countries under a low rainfall

• Campbell''s 1905 soil culture manual explains how the rain waters are stored and conserved in the soil
  Auteur(s): Campbell, Hardy Webster
• Soil culture primer a plain and practical discussion of the relation of plants to the soil and the principles of growth; the laws governing the movement of water in the soil and its evaporation from the surface
  
• Campbell''s 1907 soil culture manual a complete guide to scientific agriculture as adapted to the semi-arid regions.
  

• Progressive agricutlure, 1916, tillage, not weather, controls yield