m/ R'cconnuissaucc on Coconino National Forest 73 



Since nearly all of the Coconino Forest is surveyed the sec- 

 tion lines were used as base lines. In the unsurveyed areas a 

 base line, beginning from a known section corner was run as 

 nearly as possible through the center of the area, providing it 

 occupied not more than one township; if the area was greater 

 than this, additional base lines had to be run. Each section was 

 crossed twice, going out on one "forty line" and returning on the 

 other and checking on each section corner. By crossing a section 

 but twice it can readily be seen that frequent offsets were nec- 

 essary in order to correctly map in a road, boundary of a type 

 or other features that were to be shown. 



The grazing land on the Coconino was divided into nine 

 general types each being represented on the map by ?. number. 

 The subtypes under these general types were represented by the 

 initial letter or letters of the predominant forage. The tree spe- 

 cies occurring on any of the types were shown by the initial 

 letter or letters placed in parenthesis. The general types men- 

 tioned were as follows : 



1. Open grass land, other than meadow. Many open areas 

 or parks occurring in the timber and woodland types generally 

 support a good stand of grasses. At upper elevations there are 

 large Mountain Bunch Grass (Muhlenbergia gracilis) and Pine 

 Grass (Festuca arizonica) areas, which were represented on 

 the map as 1 B. and 1 P. respectively; if they both occurred on 

 the same area they were represented as 1 B. P. Small parks 

 occur in nearly all valleys and may either have a good stand of 

 Blue Grama (Bonteloua oligostachya) and Black Sporobolus 

 (Sporobolns inter ruptus) or may have been overgrazed in the 

 past and now have only a stand of annuals. At lower elevations 

 there are many large parks with Blue Grama predominating, 

 which were represented as 1 G. 



2. Meadozv. The few wet meadow lands where water 

 grasses (sedges) predominate occur as narrow bands around 

 permanent lakes or may cover the entire bed of intermittent 

 lakes. 



3. Weeds. There are many untimbered areas where weeds 

 predominate. On many of these there probably was once a good 

 stand of grasses, but overgrazing in the past has caused the kill- 

 ing out of the grasses and the occupancy of the range by weeds, 

 many of which have little or no forage value. Some of these 

 overgrazed areas on which the grasses were not entirely killed 

 out and whirh have been especially favored by some protection 



