ig2o] 



W A LISTER— BARLEY 



"3 



by evaporating almost to dryness on the steam bath and then 

 taking down to constant weight in a vacuum desiccator. 



TABLE IV 



Effect of temperature upon amount and percentage of dry matter and 



water in barley leaves 



Culture no. and treatment 



44. High N warm 



24. High N warm 



41. High P and N warm 



108. High N cool 



87. High N cool 



104. High P and N cool. . 



Green 



weight 

 (gm.) 



9295 

 88.23 



96.87 

 69. 20 

 65.68 

 71-37 



Dry weight 

 (gm.) 



12.67 

 12.79 

 II . IO 

 IO.92 

 IO.23 

 II .04 



Weight of 

 water (gm.) 



80.28 

 75-44 

 85-77 

 58.28 



55-45 

 60.23 



Percentage 

 of water 



86.36 

 85-5° 

 89.47 

 84.21 

 84.42 

 84-39 



Percentage 

 of dry 

 matter 



13 



14 

 IO 



15 



iS 



is 



64 



50 



S3 

 79 

 58 

 61 



Material insoluble in ether, alcohol, and water was designated 

 as fraction 3 (F 3 ) . This entire fraction was dried to constant weight 



Fig. 10. — Influence of supplementary P fertilization on heavy N fertilization: 

 all cultures received equal heavy doses of N in form of NaN0 3 ; cultures nos. 41 and 

 104 received equal dosage of extra P; nos. 41 and 44 grown in warm house; nos. 104 

 and 108 in cool house; P failed to counteract effects of N at higher temperature; 

 chemical analyses made of leaves from this set of cultures. 



at ioo° C. in an electrically heated oven. Table IV gives the 

 relative proportions of moisture and dry matter in the several 

 samples analyzed. 



