440 



Journal of Agricultural Research voi.xxu.no.; 



17 /S 13 2021 ii232^ZffZ6Z7£d29^^l I 2^^6678 



Fig. a.-Percentage of ash, by progressive three-day averages, in the rachis of Hannchen barley grown on 

 plots variously irrigated at Aberdeen, Idaho, in 191 7. 



the ash content of the soil is low, there was a much lower percentage of 

 ash than in the western-grown samples. The analyses from the West, 

 are, however, more significant in this connection, as shattering occm-s 

 much more commonly in the arid regions than in the humid regions. 



