516 



Bulletin 84 



TABLE V. MECHANICAL ANALYSIS OE SOIL FROM SMITH FIELD, 



SNOWFLAKE DRY-FARM 



Average 



Note- The .separates referred to in the mechanical analyses eiven in this 

 bulletin are those of the U. S. D. A. Bureau of Soils. Fine grravel, diameter 2 to 1 

 millimeters; coarse sand, 1 to 0.5 mm.; medium sand, 0.5 to 0.25 mm.; fine sand, 0.25 

 to o.lO mm.; very fine sand, 0.10 to 0.05 mm.; silt, 0.05 to .005 mm.; clay, less 

 than 0.005 mm. 



TABLE VI. CHEMICAL ANALYSIS OF SOIL FROM SMITH FIELD, 



SNOWFLAKE DRY-FARM 



Note: The chemical analyses of dry-farming soils reported in this bulletin 

 refer to that portion of the soil solub'e i" hydroch'oric acid. 1.115 sp. err., according 

 to the methods of the Association of Othcial Agricultural Chemists. The alkali de- 

 terminations refer to the .salts soluble in water when 50 erams of soil are disrested 

 with 1000 C.C. water for ten hours on the water bath. Arizona Agricultural Experi- 

 ment Station Twenty-fourth Annual Report, p. 275. 



Extensive areas of agricultural lands are found in open parks 

 and on the larger flats of the timber belt. These soils are largely 

 decomposed lava of very fine texture in the bottoms, and coar.se 

 and gravelly on the slopes. 



The best agricultural soils within the timber belt are loams of 

 medium texture, though coarser types produce well under the rela- 

 tively heavy precipitation of the region. These soils are fairly per- 

 meable and retain water very well with reasonable cultivation. The 



