North 



19 



SP - A 



20 



TH - NA 



21 

 SP - A 



22 



SH - NA 



23 

 TH - A 



ml 



13 



SH - A 



14 

 SP - A 



15 

 SP - NA 



16 



TH - A 



17 

 SH - NA 



LLI 



7 



SP - NA 



8 



SH - A 



9 



SH - NA 



10 



SP - NA 



11 

 SP - A 



li 



Downslope 



1 



TH - A 



2 



TH - NA 



3 



TH - A 



4 



SH - A 



5 



SH - A 



mi 



Figure 1. — Layout of experimental plots at Blackbird mine by numbers and treatments: SP, seeded by seeder- 

 packer, followed by application of mulch and fertilizer; SH, hydroseeded, followed by hydromulching and fertili- 

 zing; TH, seed, mulch and fertilizer all applied by hydromulcher in one operation; A, amendment by addition of 

 hay; and NA, no amendment. 



Table 1. — Mixture of grasses seeded at Blackbird Mine, October 1973 



Mixture 



Species 





Weight 



Composition 





Pounds 



Kg 



Percent 



Smooth brome (Bromus inermis) 



15 



6.804 



25 



Timothy (Phleum pratense) 



8 



3.628 



13 



Alta fescue (Festuca arundinacea) 



7 



3.175 



12 



Orchardgrass (Dactylis glomeratus) 



7 



3.175 



12 



Intermediate wheatgrass (Agropyron intermedium) Tegmar 



6 



2.721 



10 



Great Basin wildrye (Elymus cinereus) 



5 



2.268 



8 



Meadow foxtail (Alopecurus pratensis) 



4 



1.814 



7 



Slender wheatgrass (Agropyron trachycaulum) 



3.8 



1.723 



6 



Mountain brome (Bromus carinatus) 



3 



1.360 



5 



Intermediate wheatgrass (Agropyron intermedium) Grenar 



1 



0.453 



2 



Bottlebrush squirreltail (Sitanion hystrix) 



0.2 



0.090 



0.3 



Total for 0.6 acre 



60.0 



27.21 





