118 



IOWA ACADEMY OF SCIENCES. 



young grass from six inches to one foot high, and increases to 

 47.17 per cent in the grass fifty-three to fifty-five inches high. 

 The amount of ash varies from 6.71 per cent to 4.90 per cent 

 and the changes are very irregular. The following analyses 

 are added for comparison. 



NATURAL CONDITION. 



The other grass selected for presentation is Poa pratensis, 

 or Kentucky blue grass. This grass is considered one of the 

 best pasture grasses in the state, and it is said that the 

 excellence ol the Iowa stock is due largely to the pastures of 

 this grass. 



The samples analyzed in this station are given in the follow- 

 ing table: 



April 14, 1896, young, 1 to 4 inches high. 



April 29, 1896, 3 to 10 inches high. 



May 6, 1898, beginning to head out, 14 to li inches high. 



May 18, 1896, very wet, headed, 14 to 15 inches high. 



June 1, 1896, 31 to 32 inches high, 



NATURAL CONDITION. 



Sample 1. 

 Sample 2. 

 Sample 3. 

 Sample 4. 

 Sample 5. 



* Bull. Iowa Agricultural Experiment Station 11, pp. 458, 478. 

 tBull. S. D, Agricultural .Experiment Station 40, p. 94, 1894. 



* These give the water which is found in the natural condition while the other per- 

 centages of these analyses are for the water free substance. 



§ The amount of water Is for the air dried substance while the other results are for 

 water free substance. 



