68 



Sunnrary of remilts of dtiti/ of iiuder expenmenti^ ou Jield crop.'i made ni 1901. 



<i Gallatin County. b Ravalli County. <■ Yellowstone County. 



MEASUREMENTS MADE IN 1902. 



In beginning- the field tests in the spring of 1902, advantage was 

 taken of the weir boxes already in place, which had been used in pre- 

 vious years. On account of the long season, the spring being early 

 and a plentiful supply of water in the streams, more water was used. 

 In Gallatin County three crops of clover and one crop of alfalfa 

 received on an average for all four crops 20.8 inches of ditch water 

 and 9.4 inches of rain water, while five grain crops received 18 inches 

 from irrigation and 7.4 inches from rainfall. 



In Ravalli County a record was kept of the amount of water applied 

 to each of the fields previously descril)ed, and the average is consider- 

 ably higher, l)eing for the three fields 28.1 inches of irrigation water 

 and 7.9 inches of rain water. 



Summary of results of dutij <f ivater experiments on field crops mode in 1902.0 



a U. S. Dept. Agr., Office of Experiment Stations Bui. 133, pp. 137-150. 

 b Gallatin County. 

 c Ravalli County. 



