54 MODERN STRAWBERRY GROWING 
berries, causing the water to cover the ground 
completely, either pumping in the water at 
some convenient place, or damming up a 
convenient brook or stream. 
Furrows.—It is a very common practice 
in the West or mid-West to lay out a straw- 
’ berry field in such a way that water from large 
main irrigation ditches can be brought on the 
field and led only in the alternate rows of 
strawberries (because the rows between must 
be firm ground for the pickers) in deep, broad 
furrows, holding the water in these trenches 
until it has spread considerably in a lateral 
direction. It is not possible, in these 
droughty sections, without this or some other 
method, to place enough water at fruit time 
within reach of the roots so that irrigation 
would be unnecessary. The chief objection 
to this method is the fact that it is not eco- 
nomical of water. This would be quite a fac- 
tor if the water were bought by the gallon. 
Sub-irrigation. — As its name _ implies, 
something below. Where this method is 
used lines of tile or perforated pipe of vary- 
ing sizes and lengths are laid below the sur- 
face, generally one or more large mains with | 
many smaller laterals, sometimes the mains 
