SUMM.\RY. 



<n 



travel l)etween watering-s of 20 miles for cattle and 12 miles for sheep. 

 Horses travel a much trreater distance. 



The prairie dog' is doing a large amount of damage in the north and 

 northeastern portions of the Territory. 



Beardless barley should be more extensively sul)stituted for the 

 bearded form for supplementing the first cutting of alfalfa. 



The Russian thistle, while widely distributed in the northern i)art 

 of Arizona, has not yet appeared in the southern part to any extciil 

 at least. 



There appears to be abundant evidence that the creosote bush is 

 injurious to sheep, which are sometimes forced to eat it on account of 

 a scarcity of feed. 



The average total availal)le feed which it is practicable to utilize 

 upon the large inclosure is l)oli(>vod to ho botweon ir)(> and -JOO pounds 

 of air-di-y sub.stance per acre. 



Altilerilla, one of the most important forage plants of the Territorv, 

 which was probably introduced from California in the wool of sheep, 

 is spreading. It is believed that two species of clover were intro- 

 duced in the same way. 



Experimental work carried on thus far in attempting to introduce 

 perennial forage plants upon the mesas has given \-ery little encour- 

 agement. Panicaiii texanum^ an annual, has given the best results of 

 anything thus far introduced, and it is believed that more success will 

 be secured with annuals than with perennials. They are not as good 

 feed, but short-lived plants with good seed habits now furnish the 

 main feed upon the mesas. 



The following tabulation showing the relative weight of desert 

 annuals and certain of their reproductive portions will be of interest 

 in this connection: 



This table shows, so far as this amount of data can show, that the 

 seed production of these three characteristic desert annuals is large 

 when compared with the total weight of the plants. • Lotus Immilis 

 produced, in the condition indicated, 7 g-rains of clean seed. Two 

 plants of Bouteloua aristidoides, weighing 48 g-rains, produced 27 

 grains of spikelets. It is believed that there is a suggestion here 

 regai-ding the nature of the plants which will be most successful upon 



