1920] 



W A LSTER— BARLEY 



109 



houses was the sprawling condition of the high nitrogen cultures in 

 the warm house, in contrast with their upright condition in the 

 cool house. Figs. 3-15, taken April 24, show the condition of the 

 barley on that date. 



Fig. 4. — Nitrogen series, warm house 



Fig. 5. — Phosphorus series, cool house: N and K treatment of nos. 6S, 71, 75, 

 and 78 "normal" (same as no. 89 in fig. 3). 



Figs. 16-18, taken May 16, show the failure of the high nitrogen- 

 high temperature plants to mature normally. Such shooting as was 

 obtained at the higher temperature was due, in the opinion of the 

 writer, to inability to control the moisture supply, because of very 

 great fluctuation in the temperature as the spring season advanced. 

 The writer believes that had it been possible to control absolutely 



