410 University of California Publications in Agricultural Sciences [Vol. 1 



TABLE V 



Miscellaneous Soils Unaffected by Mining Detritus 



Sample No. 

 and date 



June 5, '00 



2253 

 Jan. 3, '00 



3503 

 May 9, '05 



Condition and 

 weight taken, 

 Description of sample grams 



Surfaee 12 in. from new ground 



near Safford, recently placed 100 



under Alontezuma Ditch air-dry 



Surface 12 in. university ground, 100 



Tucson air-dry 



Surface 12 in. virgin unirrigated 



soil, Colorado Valley bottom near 100 



Yuma air-dry 



Cu 

 found, 



grams 



none 



none 



none 



Cu 

 p. p.m. 



none 



none 



none 



These determinations, made in widely separated localities, 

 indicate the absence of copper in soils which are not immediately 

 under the influence of mining detritus. 



TABLE VI 

 Copper in A^egetation from Upper Gila Valley Farms 



Sample No. 

 and date 



3505 



Aug. 19, '05 



3512 

 Aug. 19, '05 



3507 

 Aug. 20, '05 



3509 

 Aug. 19, '05 



3513 

 Sept. 19, '05 



3739 



3741 



3780 



3740 



3738 



Description of sample 

 Alfalfa, before blooming, from 

 upper end of Geo. Olney 's field 

 east of Safford, under Monte- 

 zuma Ditch 



Alfalfa from bale gro\\ai in Lay- 

 ton (M. B. Steele) under Monte- 

 zuma ditch 



Corn in bloom, leaves only, grown 

 in Layton (Jas. Welker), under 

 Montezuma Ditch 



Wheat from stack, stalk and grain, 

 grown in Layton (M. B. Steele), 

 under Montezuma Ditch 



Mistletoe, growing on willow 25 ft. 

 above ground, one mile east of 

 Safford, under Montezuma Ditch 



Alfalfa seed, crop of 1906, grown 

 near Pima under Smithville Ditch 



Alfalfa seed (Win. Gillespie), crop 

 of 1906, grown near Solomonville, 

 under Montezuma Ditch 



Shelled corn, crop of 1906, grown 

 at Solomonville, under Monte- 

 zuma Ditch 



Shelled corn, crop of 1906, grown 

 at Solomonville, under Monte- 

 zuma Ditch 



Shelled corn, crop of 1906, grown 

 near Pima, under Smithville 

 Ditch 



Condition and 



weight taken, 



grams 



1206 

 air-dry 



1359 

 air-dry 



545 

 air-dry 



1125 

 air-dry 



1245 

 air-dry 



782 

 water-free 



843 

 water-free 



932 

 water-free 



874 

 water-free 



1092 

 water-free 



Cu 

 found, 

 grams 



.0062 



.0077 



.0033 



.0027 



.0094 

 .0026 



.0023 



.0004 



.0008 



Cu 



p.p.m. 



5.10 



5.70 



6.10 



2.40 



7.60 

 3.33 



2.72 



.43 



.73 



trace trace 



