Bui. 462, U. S. Dept. of Agriculture. 
Plate I. 
Fig. 1.— Cross Section of Soil Formation in Subirrigated Section, Sanford, 
Fla.: A, Light Topsoil; B, Hardpan; C, Water. 
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Fig. 2.— Water-Tight Main and Stop-Box Connection to Subirrigation 
Laterals, Sanford, Fla. 
