34 BULLETIX 367, U. S. DEPAKTMEXT OF AGKICULTURE. 



season of 1914 seemed to be very favorable, but very few trees set 

 fruit. The data as to measurements are as follows : 



One tree about 1 mile nearly east of the location marked I on the map (fig. 

 2), 9 feet high, with a spread of 10 feet, produced as second crop lOf pounds 

 of dried beans (PL VIII, fig. 2). Another tree near McCleary's house, 9 feet 

 high and with a spread of about 14 feet, produced 10 pounds of dry beans as 

 a first crop. Probably 60 per cent of the trees on the reserve are as large or 

 larger than the two measured. 



Erosion retarded. — The process of leveling the land by the action 

 of water, assisted by the growth of vegetation, has been going on 

 ever since the stock were put out of the reserve and the plants com- 

 menced to reestablish themselves. It has been carried to completion 

 in some of the shallower arroyos, and the bottoms of the watercourses 

 are entireh" covered with plants. The larger arro3'os still have well- 

 marked sand}" channels where nothing but coarse annual weeds grow, 

 but the grasses are rounding otf the banks of such channels and 

 gradually diminishing their width, while in many places they pre- 

 vent further erosion by growing directly in the narrow cut and 

 helping to hold whatever earth may be washed in by the run-off 

 (PL IX, fig. 1). 



Seed solving. — Xumerous attempts at reseeding have been made on 

 this range reserve and elsewhere, the results of which have been 

 reported in previous bulletins.^ Most of the attempts have resulted 

 negatively. Particularly is this true with reference to introduced 

 species, although these have been selected with the best judgment ob- 

 tainable as to the requirements of the region and the possible adap- 

 tiveness of the species tried. It by no means follows that nothing 

 will ever be found that will suit the conditions, and there is believed 

 to be good reason for expecting tiiat some valuable finds of this kind 

 will be made in regions not yet carefullj^ explored with these desires 

 in mind. 



The alfilaria, previously reported as seeming to take hold, has 

 since been entirely crowded out by the native perennial grasses. 

 Several annuals that gave some promise have also given way to the 

 native perennials. 



Trials of Sudan grass were made at three different places on the 

 reservation in 1914 — near MacBeath's house, near McCleary's, and 

 in the large field on the plowed ground (near H, fig. 2). The seeds 

 germinated well at each place, but the young seedlings were not able 

 to bear the dry weather that occurred after the first rains. Plants 

 at MacBeath's which were watered during the first dry spell made 

 a good growth (about 3 feet) and produced some seed. Plants 



1 See Bureau of Plant Industry bulletinf? as follows : No. t, reporting results on a small 

 range near Tucson; No. 67, giving later resuUs on the same area; No. 117, treating of 

 metnods and results of reseeding in general ; No. 177, treating of results on tliis range. 



