LAND CONTOUR 47 
spots, and also insures good soil and air drainage. The particular 
site selected should have plenty of land sloping to the south, for 
Fic. 33.—Semi-community poultry plant. Hatching and brooding buildings in back- 
ground, and isolated single-pen and double-pen laying houses distributed over the rest of the 
plant. Roads and double yarding are common in this system. 
such areas are usually warm, and they are usually much drier. 
Slopes to the north should be avoided, as they have all of the un- 
Fic. 34.—Colony houses for poultry on extensive range. The house in the foreground shows 
cheap construction. 
desirable features of cold temperature, moisture, and no protec- 
tion from the north winds. In studying the character of the 
country, a contour map is an advantage. The weather records 
