GRASSES OF IOWA. 



331 



WATER FREE SUBSTANCE. 



Sample 1 

 Sample 2. 

 Sample 3 

 Sample 4. 

 Sample 5. 



25.56 

 34.84 

 41.47 

 37.55 

 33.23 



In the above results we find that the amount of water present 

 in the grass as received in the laboratory is very constant 

 indeed, the highest being 78. 96 per cent and the lowest 73.46 

 per cent, a difference of only 5.5 per cent. In the comparison 

 of the results of the analyses based on the dry matter, we find, 

 in the fat content, that the amount decreases comparatively 

 little as the grass matures. However, with the amount of 

 protein present there is a marked decrease from 38.98 to 14 46 

 percent, and in the albuminoids from 26.99 per cent to 8. 83 per 

 cent The crude fiber increases on the contrary from 16 23 

 per cent to 32 92 per cent. The amount of nitrogen free 

 extract present varies greatly. There is no constant increase 

 but it varies from 25.56 to 41.47 per cent. 



The following analyses have been selected for comparison 

 with the work of this laboratory: 



SAMPLE FROM. 



Northern grown (1) 



Iowa (2): 



Cut Aoril 28, (3-6 in. high). . 



Cut May 8, (8 in. high) 



Cut May 18, (Panicle spread- 

 ing) 



Cut May 28, (early bloom) . . 



Cut June 7, (after bloom) 



Cut July 5, in seed, brown. . . 



Average of 3 analyses before 



blooming 



Louisiana (3) 



Mississippi (4): 



Gathered March 



Gathered April 



Gathered May, just headed.. 



Gathered June, over ripe. . . 



North Dakota (5) 



Oregon (6) 



^ 



n2.i5 



*15.35 

 *65.10 



3.60 



5.55 

 4.14 



3.89 

 2.25 

 2.75 

 3.05 



4.53 

 3.35 



3.03 

 1.30 



Oh 



10.50 



18.03 

 13.58 



11.11 



9.67 



7.88 

 7.89 



14.24 

 8.00 



21.79 

 9.04 

 3.25 



18.21 

 6.53 

 4.10 



26.10 



22.19 

 22.74 



24.36 

 29.11 

 29.92 

 30,55 



23.09 

 23.56 



24.75 

 34.64 

 30.71 

 30.12 

 27.29 

 9.10 



7.90 



11.49 

 10.67 



8.75 

 8.47 

 8.66 

 9.98 



10.30 

 10.16 



12.00 

 5.34 

 9.12 

 7.45 

 4.16 

 2.80 



2; 



51.90 



42.74 



48.87 



51.89 

 50.50 

 51.79 



48.53 



47.83 

 42.78 



37.08 

 46.85 

 42.02 

 50.09 

 43.64 

 17.60 



1. D. S Dept. A?rl. Exp. Sta. Rec. 6:102. 1894. 



2. Bull. Iowa E.xp Sta. 11:432. 434. 



3. Bull. La. Agrl Exp. Sta. II. 19:536. 562. 



4. Ahu. Rept. Miss. Agrl. Exp. Sta. 8:92. 1895. 



5. Bull. N. D. Agrl. Exp. Sta. 15:49. 1894. 



6. Bull. Oregon Agrl. Exp. Sta. 39:49. 1895. 

 ♦Analyses are for natural or air dry' condition; 



Stances. 



others are for iwater" free-sub- 



