Oct. 15, 1914 



Water Requirement of Plants 



27 



Table XVII. — Water requirement of different millets and prosos at Akron, Colo., in 



igi2 and igij — Continued 



In grain production the millets make a remarkable showing, the 

 prosos leading in this respect. Measurements of the water require- 

 ment of the three varieties, based on grain production, gave the follow- 

 ing results : 



Variety of millet or proso Water requirement 



Voronezh proso , 425±4 



Tambov proso 482 ±9 



Kursk millet 483 ±11 



Voronezh proso, according to these figures, is able to produce nearly 

 2 pounds of grain with the water required for the production of i pound 

 of alfalfa hay. 



Kursk millet was also included in the 1913 measurements. Its water 

 requirement was 286±4, or 53 per cent higher than in 1912. Many of 

 the plants were broken by a high wind shortly before harvest, which 

 greatly reduced the grain yield. The mean water requirement, based on 

 grain production, has consequently been omitted. 



ivEGUMES 



The legumes tested at Akron in 191 2 included sweet clover, chick-pea, 

 and two strains of Grimm alfalfa, one being a selected strain (PI. V, 

 figs. 4 and 5) developed by Mr. A. C. Dillman. Both the alfalfa and 

 the sweet clover showed a marked reduction in water requirement 

 compared with the results obtained in 191 1. Three cuttings were made 

 in the case of each crop, but the plants were not mature at the time 



