36 BULLETIN 367, U. S. DEPAETMEXT OF AGKICULTUEE. 



good as formerly. The quantity of feed produced, however, has 

 increased very much, and the change in kind has shown quite con- 

 clusiveN what every stockman ah^eadj^ knew, i. e., that the region 

 is better adapted to cattle and horses than it is to sheep. The grazing 

 of these small bands of sheep on the range reserve did not affect the 

 range in any way detrimentally in the short time they were there. 

 It was hardly possible to see where they had been running except 

 about the bed grounds, though the herder's camp was not moved 

 while he was on the reserve. 



FUTURE INVESTIGATIONS. 



Summarizing the data so far collected on the Santa Rita Range 

 Reserve has not only shown the results obtained, but has pointed out 

 several lines along which further data should be collected by con- 

 tinuing work in progTess, and it has also suggested some new lines of 

 investigation. 



Besides keeping watch on the rate of spread of the various grass 

 associations mentioned in this bulletin, it is very desirable to devise 

 some way of measuring the productivity of the black-grama asso- 

 ciation more accurately than has heretofore been possible. Special 

 attention should be paid to its rate of spread in the northwest corner 

 of the reserve. The question of whether it will supplant the crowfoot- 

 grama association at the lower levels is one of great importance, as is 

 the time it will take for the black-gTama association to cover any 

 given area. 



Some accurate measurements as to the rate of spread of the long- 

 lived perennial grasses like Heteropogon contortus and Bouteloua 

 eripoda are desirable, as are more data on the productivity of the six- 

 weeks-grass areas. The rate of recovery and factors affecting it on 

 the plowed areas should be studied carefully. Some seeding experi- 

 ments with the local species should be tried in the extreme north- 

 eastern corner where these grasses have been very largely killed out. 



Assuming that that part of the recovery pasture lying east of the 

 Helvetia road has about reached its normal productivity, it would 

 seem to be wise to establish ah experiment to determine just what 

 the carrjdng capacity of this area is, by grazing off the forage crop 

 with a definite number of animals that are kept on it all the time, 

 this number to be based upon estimates already obtained from 

 quadrat measurements and hay-cutting records. 



SUMMARY AND CONCLUSIONS. 



The conditions under which the series of experiments of which 

 this bulletin is a report of progress were carried on are set forth 

 in the introduction. An attempt is here made to summarize the 

 results so far obtained, those reported in previous bulletins being 

 included for the sake of completeness. 



