GRASSES OF IOWA. 



319 



Sample 1. 

 Sample 2. 

 Sample 3. 

 Sample 4. 

 Sample 5. 

 Sample 6. 



April 24, 1896, 7 to 16 inches high. 

 May 4, 1896, 14 to 16 inches high. 

 May 18, 1896, sample very wet. 

 May 26, ]896, 38 to 42 inches high 

 June 5, 1896, 28 to 30 inches high. 

 June 17, 1896, 40 to 45 inches high. 



NATURAL CONDITION. 



Sample 1 

 Sample 2. 

 Sample 3. 

 Sample 4. 

 Sample 5. 

 Sample 6 



.1i <o 



3.77 

 5.21 



5.81 



7.99 



5.57 



11.96 



WATER FREE SUBSTANCE. 



Sample 

 Sample 

 Sample 

 Sample 

 Sample 

 Sample 



26.00 

 33.67 

 34.72 

 36.61 

 26.15 

 39.55 



From these results it is readily seen that there is a decrease 

 in the amount of water present in the samples as growth 

 increases. In the dry condition we find that the fat varies in 

 the sample from 6.62 per cent to 4.04 per cent. There is not a 

 regular decrease in this constituent, but it is somewhat irregu- 

 lar. Regarding the amount of protein we might say that there 

 is a regular decrease with one exception from 30.25 per cent to 

 9. 11 per ceot. With the crude fiber there is a tendency for the 

 amount to increase as the plant grows older as we have in the 

 first sample 23.01 per cent and in samples 5 and 6; 40.60 per 

 cent and 38.76 per cent respectively and the same may be said 

 regarding the amount of nitrogren free extract increasing from 

 26 per cent to 39. 55 per cent with one exception. 



