METHODS OF APPLYING WATER. 



185 



to trickle gently through them until the land is well 

 moistened at a spade's depth between the furrows. 

 Before allowing to dry, hoe back the earth into the 

 furrows, and cultivate as soon as the land will admit. 

 By irrigating in this way evaporation will be reduced, 



FIG. 53 — DOUBLE FURROW ORCHARD SYSTEM. 



water will be economized, the earth will be moistened 

 to a depth of at least two feet, and one irrigation of 

 this kind will last as long as two or three by flooding. 

 A Caution Against Erosion. — If the water is 

 allowed to rush down the furrows so rapidly as to be- 

 come turbid by picking up the finer particles of soil, 

 these particles will be deposited farther down the fur- 

 rows as the volume of the stream becomes smaller and 

 the current becomes less on account of the absorption 



