1917] Forbes: Irrigation Effects of Copper Compounds Upon Crops 423 



TABLE XIV (c) 

 Corn roots grown in well water with Cu(OH)2.CuC03 



Showing stimulation at .03 ji.p.m. 



TABLE XIV (d) 



Squash roots grown in well water with Cu(0H)o.CuC03 



Cu p.p.m. Elongation 48 hrs. Cu p.p.m Elongation 48 hrs. 



check 12.0 mm. .08 12.3 



.03 10.7 .1 13.2 

 .05 10.0 



Showing no stimulation at these concentrations. 



TABLE XIV (6>) 

 Bean roots grown in well water with Cu(0H)o.CuC03 



Condition 

 Tops strong through- 

 out, showing stimula- 

 tion at .03, .05, and .1 



Showing stimulation at .05 p.p.m. 



TABLE XIV (/•) 

 Squash roots grown in well water with Cu(0H)o.CuC03 



Elongation 48 hrs. 

 7.6 mm. 

 9.7 



3.7 



Not showing stimulation consistently. 



TABLE XIV (g) 

 Corn roots grown in well water with Cu(0H)2.CuC03 



Cu p.p.m. Elongation 48 hrs. Cu p.p.m. Elongation 48 hrs. 



check 9.8 mm. .1 13.5 mm. 



.01 13.8 .3 10. 



.05 17.5 .5 3.8 

 Showing strong stimulation .01 to .1 mm. 



