382 



GRASSES OF IOWA, 



while probably not a valuable griss for early,pasturlng, it is 

 useful in late summer and autumn, provided grazing is not too 

 close. It is an excellent grass for hay, thriving in poor, sandy, 

 rocky soil, as well as on the richer prairie. It is less common 

 than Andropogon scoparius. The allied turkey -foot grass {A 

 halli hack) is not native to the state, bat is reported as natural- 

 ized near Muscatine by Barnes and Miller. It grows from 

 three to six feet high. In western Nebraska it is -considered a 

 valuable grass. 



CHEMICAL COMPOSITION. 



The following five samples of Andropogon provlncialis were 

 analyzed in the laboratory: 



Sample 1. Collected May 26, 1896, 23 to 24 inches high. 



Sample 2. Collected June 5, 1896, 27 to 28 inches high. 



Sampled. Collected June 17, 1896, :?6 to 37 inches high. 



Sample 4. Collected June 29, 1896, 39 to 40 inches high. 



Sample 5. Collected July 13, 1896, 48 to 49 inches high. 



NATURAL CONDITION. 



Sample 1 

 Sample 2 

 Sample 3 

 Sample 4 

 Sample 5 



12; 



11.58 

 11.45 

 10.15 

 17.56 

 16.30 



WATER FREE SUBSTANCE. 



Sample 1. 

 Sample 2. 

 Sample 3. 

 Sample 4. 

 Sample 5. 



43.69 

 43.66 

 38 88 

 53 01 

 41.44 



In the analyses of the samples of Andropogon provincialis it 

 is readily seen that there is a tendency for the mount of water 

 to decrease; this is not with a regular decrease in the amount, 

 however. 



In considering the constituents in the water free substance 

 we find that the amount of fat varies between wide limits and 

 there is no regularity in the change, sample No. 3 having the 

 largest amount of the substance. The amount of protein and 



