1920J 



WALSTER—BARLFA 7 

 TABLE II— Continued 



i°5 



Jar no. 



5* j ~ 



114/ 



52,53.54 \ 

 115,116,117/' 

 55,56 \ 

 119, 120/' 



57 \ 



118/ 



58,59 \ 

 122,123/' ' 



60 1 

 121/' 



61,62 \ 

 124,125/' 



63 \ 



126/ 



General treatment 



Solution AB + i gm. N, 

 1 gm. K 



Solution AB + i gm. P 



Solution AB + i gm. N, 

 1 gm. K, 1 gm. P 



Solution AB + i gm. N, 

 1 gm. K, 1 gm. P 



Solution AB + i gm. N, 

 igm. P 



Solution AB + i gm. N, 

 1 gm. P 



Solution A B + 2 gm. P, 

 1 gm. N 



Solution A B + 2 gm. P, 



1 gm. N 



Supplementary treatment 



Second dose of 1 gm. N and 1 gm. K 

 March 30; 1 gm. N and 2 gm. K 

 April 26 



Second dose of 1 gm. P March 30; 

 1 gm. N April 26 



Second dose of 1 gm. each of N, K, 

 and P March 30; of 2 gm. each 

 April 26; 2 gm. N April 29 



Second dose of 1 gm. each of N, K, 

 and P March 30; 1 gm. Nand 2 gm. 

 each of K and P April 26 



Second dose of 1 gm. each of N and P 

 March 30; 2 gm. more of each 

 April 26; 2 gm. of N April 29 



Second dose of 1 gm. each of N and P 



March 30; 1 gm. N and 2 gm. 



April 26 

 Second dose of 2 gm. P and 1 gm. 



March 30; 4 gm. P and 2 gm. 



April 26; 2 gm. N April 29 

 Second dose of 2 gm. P and 1 gm. 



March 30; 4 gm. P and 1 gm. 



April 26 



N 



N 



N 

 N 



* Jars nos. 1-63 inclusive kept in warm greenhouse; jars nos. 64-126 inclusive kept in cool greenhouse 



the thermograph records obtained in the two houses (figs. 1, 2). 

 It will be noted that there was a fairly satisfactory degree of control 

 up to about the middle of April, at which time (April 19) the samples 

 for chemical analyses were taken. The principal fluctuations came 

 at about noon ; a considerable temperature difference always existed . 

 The degree of humidity was not under a complete control as 

 desired, the evaporation rate averaging somewhat higher in the 

 warm house. It is possible that some of the differences noted in 

 chemical composition are due to the higher evaporating power of the 

 air in the warm house. This higher evaporation rate was, of course, 

 a function of the higher temperature. 



Observations on growth of barley cultures 



During the first two weeks of growth the plants in the warm 

 house, which were several inches high before the plants in the cool 

 house had come up, maintained a more rapid growth rate. The 

 first leaves of all of the plants in the warm house, except those 

 receiving little or no nitrogen, tended to lop over. The low 



