590 



Journal of Agriculture, Victoria. [15 Oct., 1919. 



care being taken that the outlet pipes are well above the natural level 

 of the water in the channel, as otherwise the silting up of pipes will 

 result, rendering the system inoperative. 



The diagonally-shaped flat, as seen adjoining the road in the diagram, 

 is not involved in any of the hill drainage, being cut off by the smaller 





^^ 



I ^ 



Plate 21.— Plan of an orchard at Diamond Creek. 



water-course, and, therefore, it had to be drained separately into the 

 smaller channel towards which it had a natural fall. In the case of the 

 orchard referred to, the planning of a satisfactory drainage system 

 presented no serious difficulty, owing to the existence of a nice clay 

 subsoil, and natural outlets for the drainage water. When, however, 



