Bui. 462, U. S. Dept. of Agriculture. 
Plate II. 
Fig. 1.— Subirrigation Lateral Tile Laid in Trench Before Joints are Covered. 
Fig. 2.— Subirrigation Stop Pockets, Sanford, Fla. 
Fig. 3.— Water Supply and Tools Used for Subirrigation, Sanford, Fla. 
