192 



Journal of Agricultural Research 



Vol. XVI, No. 7 



Table IX. — Air-dry weights of the corn plants in each of the experiments 



It will be noted again that the maximum increase in yield occurred in 

 the presence of strontium carbonate, while equal amounts of barium 

 carbonate produced only a very slight increase in the yield of the entire 

 plants. 



It is interesting to note that all of the roots in the corn experiment 

 show some increase in yield over that of the controls, while in the weight 

 for the stalks there are an equal number of minus and plus differences. 

 In the weights of the fodders there is only one experiment in which the 

 fodder produced is less than the control. In the weights for the entire 

 plants barium sulphate gave a very decided negative difference. Both 

 the sulphate and the chlorid reduced the yields in the stalks very de- 

 cidedly. 



Table X. — Analyses of the corn fodder from the preceding expervinents 

 [The results are expressed as percentage of the moisture-free substance) 



« The irregularities occuring in the iron determinations are probably due to iron-oxid scales which may 

 have come from the paint on the mill hopper, as some such scales were obscived in some of the samples. 



