420 



IRRIGATION PRACTICE 



V-shape, and shod on the outside with iron cutting-edges. 

 Such an iron "snow-plow" is also very effective in clearing 

 sage-brush from the land. The most effective method, 

 when it can be used, is to burn off the brush. In the inter- 

 mountain country with dry summers, the brush often 

 becomes very dry in late summer, and on a day when a 

 light wind is blowing it may be possible to remove the 

 brush from a large area. The obvious dangers that 

 accompany fire must always be considered. Many 

 machines are on the market for removing sage-brush; 



FIG. 123. Section of 

 V-shaped flume. 



FIG. 124. Wooden flume. FIG. 125. Section of rectangular flume. 



none are wholly satisfactory, and as the country is taken 

 up, there will be no further need for them. 



252. Laying out the farm. Once the land has been 

 cleared, the farm should be laid out with reference to the 

 crops to be grown, rotations to be followed, and the most 

 effective methods of applying water. The characteristic 

 feature of farming under irrigation makes it of first 

 importance that the lay-out be made with direct reference 

 to the location of the irrigation ditches that must cover 



