Some browse seed was also applied by a dribbler on one of 

 the tractors. 



The 1977 treatment portion of the Eight-Mile area was 

 seeded with: 



Crested wheatgrass 

 Intermediate wheatgrass 

 Pubescent wheatgrass 

 Ladak alfalfa 



Total 



2.5 lb per acre 



6.3 



1.2 



0.5 



10.5 lb per acre 



In addition, about 0.2 lb per acre of bitterbrush seed was 

 applied by dribbler. 



The oldest treatment area (1955) was cabled twice, and 

 the slash was bunched into windrows with a small 

 crawler tractor. Wheatgrasses were seeded on the area, 

 but the sequence of procedures and detail of seed mix- 

 tures are not known. 



RESULTS 



Data were collected from all treatment areas the final 

 year of study (1985). Table 4 presents these data by spe- 

 cies to illustrate composition of the plant communities at 

 the end of the study. The older treatment sites (Eight- 

 Mile area) were strongly dominated by introduced 

 wheatgrasses. They made up 91 percent of the composi- 

 tion in the 1955 treatment area and 71 percent in the 

 1977 treatment area. Intermediate and pubescent 

 wheatgrasses were most prevalent followed by crested 

 wheatgrass. These grasses so dominated the site that 

 only a limited amount of shrubs were present and there 

 were few forbs. The Clay Springs and Church Hills areas, 

 which were treated as part of the Oak Creek Mountadn 

 Range management program, had less dominance by 

 seeded grasses — 60 and 44 percent, respectively. Western 

 wheatgrass {Agropyron smithii), bluebunch wheatgrass 

 (A spicatum), and Indian ricegrass — desirable native 

 perennial grasses — were more apparent in the composi- 

 tion. A greater variety of both forbs and shrubs were also 

 present in the areas more recently treated. 



Table 4 — Data (lb per acre) collected in 1985 from the four pinyon-juniper treatment areas 



Eight-Mile 1955 treatment Eight-Mile 1977 treatment 

 Slope position Slope position 



Swale Side Ridge Swale Side Ridge Clay Church Hills 



Bottom Slope Crest Bottom Slope Crest Springs Treated Untreated 



Grasses 



Agropyron cristatum 60.7 



Agropyron intermedium 389.7 



Agropyron smithii 24.0 



Agropyron spicatum .0 



Agropyron trichiophorum 363.0 



Bromus inermis .0 



Bromus tectorum .3 



Dactylis glomerata .0 



Elymus junecus .0 



Oryzopsis hymenoides .0 



Poa bulbosa 2.7 



Poa fendleriana .0 



Poa secunda 8.0 



Si tan ion hystrix .0 



Stipa comata .0 



Forbs 



Agoseris glauca .0 



Allium acuminatum .0 



Alyssum desertorum .0 



Antennaria dimorpha .0 



Arabis holboelii .0 



Arenaria kingii .0 



Astragalus cibarius .0 



Astragalus convallarius .0 



Astragalus eurekensis .0 



Astragalus utahensis .0 



Calochortus nuttallii .0 



175.0 



123.5 



274.8 



167.0 



247.3 



193.3 



416.5 



373.7 



.0 



.0 



7.8 



.0 



6.0 



27.3 



5.8 



51.3 



197.7 



140.0 



155.5 



51.3 



.0 



.0 



.3 



3.0 



.3 



.8 



.3 



8.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



2.3 



1.8 



40.0 



.0 



.0 



.0 



.0 



.0 



6.7 



3.5 



8.0 



24.3 



.0 



.0 



.1 



.3 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



T 



.3 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.3 



.1 



.0 



1.8 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.0 



.1 



.0 



.0 



.1 



.3 



291.3 



153.1 



123.1 



0.3 



153.0 



42.1 



88.1 



.0 



.0 



12.2 



11.1 



2.2 



95.3 



70.8 



98.9 



21.6 



34.3 



46.2 



26.0 



.3 



1.3 



43.0 



1.4 



.0 



5.3 



53.0 



9.1 



18.1 



.0 



.0 



1.7 



.0 



.0 



.0 



2.0 



.0 



.0 



8.9 



13.2 



4.0 



1.7 



.0 



.0 



.0 



.0 



.0 



.0 



.1 



7.7 



9.7 



3.2 



17.8 



1.0 



1.1 



5.3 



3.6 



3.0 



.0 



1.7 



.5 



1.0 



.0 



.3 



T 



T 



.0 



T 



.2 



.1 



.0 



T 



.3 



.4 



.0 



.1 



.1 



.0 



.0 



.2 



T 



.0 



.0 



.1 



T 



.0 



.0 



.0 



.0 



.0 



.0 



2.0 



1.6 



.0 



.0 



.2 



.7 



.0 



.0 



.0 



.0 



2.3 



.0 



.3 



.7 



(con.) 



4 



