THK SMALL INCLUSUHK. 11 



by Ji sniootliiiiti' harrow, in soiiio cases the o-rouiui was liarrowod or 

 disked l)et'ore planting, and in others the seed was sown on the uncul- 

 tivated mesa. Resides the seed sown, J.l/>/>!(i rcpens. recommended as 

 a soil l)inder for arid situations, was ])lant('(l on one of the embank- 

 ments. This plant is still livinj>- and has covered the spaces between 

 the hills in a few places; but it can hardly be considered promising 

 for situations which do not receive more rainfall than these mesas. 

 Plantings of this species subsequently made have failed entirely. 



The vast majority of the plantings of grasses made the first year 

 were a failure from the start: that is, the seed did not germinate at 

 all. There were some good rains following closely upon the comple- 

 tion of the seeding, furnishing ideal conditions for the germination of 

 such grasses and other forage plants as are adapted to the prevailing- 

 conditions at that season. The following are the mean temperatures 

 for the early months of 1901 at the university. 5 miles distant: Janu- 

 ary, 51° F.; February, 52° F.; ^larch, 55.6° F.; April. (U.T- F. 



As will l)e seen from an examination of the lists pul)lished in Bul- 

 letin No. 4 of the Bureau of Plant Industry, some of the seed planted 

 was from the Northwestern States, l)ut the greater part of it was 

 native seed gathered the previous autumn. A considerable (luantity 

 which might be considered native was nevertheless from a very differ- 

 ent situation from that in which it was planted upon the mesas sur- 

 rounding Tucson. As examples may l)e mcMitioned the seed secured 

 in Sulphur Spring Valley, Arizona, and in Silver City, X. Mex., all of 

 which grew at high elevations. A comparison of the northern and 

 southern seed during the two following nionths was very interesting 

 indeed. It was the seed from the northwest which gave promise of 

 success during February and early March. Scxeral species from the 

 north germinated remarkably well, while the vast majority of the 

 native species did nothing, as was to be expected, for they make their 

 growth during the hot, moist weather from duh' to September. To 

 this general rule, however, there were some marked exceptions. 

 B<nit(^hni(i nn<j<>sf(iclnj(u for instance, germinated well and there was a 

 good stand of it on plots -tS and Hit in March. Fpon these plots native 

 seed was sown, but it was secured from an altitude of a])out 5,000 feet. 

 Seed of this species received from tlie north did not germinate., pos- 

 sibly owing to its being old or poorly matured. ]\huiy of the nati\(' 

 species which -did nothing upon the range germinated in the grass 

 garden a few days later in the season, as discussed in the text and 

 tables given below. Rescue grass {Bt'omus unioloidex) purchased 

 from seedsmen and of unknown origin germinated well enough to 

 make a good stand had it l)een able to combat the drought of spring 

 and early summer. It would have succeeded much ))etter, no doubt, 

 if it had been planted in early autumn. 



The foUowino- tabular statement in connection with Bulletin No. -1 



c5 



