180 



Irrigation and Drainage 



which had been sown with it. It so happened that immediately 

 after each time of irrigating the barley a good rain followed, and 

 the difference in yield of grain and straw per acre was small, as 

 stated below: 



Irrigated Not irrigated Difference 



Air-dry straw-lbs 5,735 5,133 602 



Air-dry grain bu .' 45.67 44.25 1.42 



But the effect on the clover was very marked. In order to 

 bring up the clover on the areas not irrigated, the ground was 



Fig. 31. Second crop of clover hay on irrigated ground. 



irrigated immediately after cutting the barley, July 23. Two other 

 irrigations were given the ground, and as a result there was a crop 

 of mixed clover and barley, cut on Sept. 22, which equaled 1.36 

 tons of hay. The barley cut with the clover resulted from the 

 germination of seed which shelled in harvesting the grain, and 

 was just heading out when it was cut to put into the silo. 



It is very evident, from these results, that it will be possible 



