360 



Jounml of Agriculture, Victoria. [10 June, 1918. 



beyond the channel bank at the delivery end. The box is fitted with a 

 sliding gate at the intake to regulate the outflow. 



Plate 168 shows the irrigationist adopting the four-furrow method 

 of watering. Here the water is drawn from the channel through 

 lengths of 2-inch galvanized iron piping placed in the bank at points as 

 indicated by the arrows. When it is necessary to discontinue the flow 

 of water from the channel, wooden plugs are placed in the intake ends, 

 or the pipes may be drawn from the bank, and the opening in the earth 

 closed in. Any old iron piping of the necessary diameter suits this pur- 

 pose, and as regards cost, utility, and freedom of manipulation, this 

 method is, in the opinion of the writer, preferable to the outlet box 

 principle. 



Plate 168. — Irrigationist adopting the Four-furrow Principle. 



Plate 169 is a drawing showing the cross section of a supply channel 

 and depicting the outlet pipe in the bank. The intake end of the pipe 

 should be sufficiently low to insure a flow as continuous at those times 

 when, owing to the working of a large number of outlets, the water falls 

 as when it was at the highest level. The delivery end of the pipes should 

 protrude at least 12 inches beyond the bank, and be near the surface 

 level to afford easy access of the water to the furrows in which it is 

 controlled and by means of checks and deviations distributed as 

 occasion requires. 



Cultivation Contingent on Irrigation. 

 Although the intelligent settler soon masters all the details con- 

 nected with fruit-growing under irrigation, ultimate success can only 



