234 ANNUAL KEl'OKT OF THE Off. Doc. 



in the yields of the third year. Kaw phosphate and lime continue 

 to show deficits in every way except in color for the former and in 

 growth for the latter. We can hardly see any reason for this harm- 

 ful effect in the case of the "floats" and suspect that it is due to 

 some temporary condition which will di8api)ear later. The same 

 may be true of the lime ellect, though the reports of "lime ])oison- 

 ing" made by Dr. lleadden in Colorado Bulletin 181 are worthy of 

 consideration in this connection. It is also worthy of note that the 

 plots which have made the best yield have also made the best 

 growth, thus showing that reasonable amounts of yield and growth 

 are not antagonistic but rather are associated. 



A puzzling condition appears in the fact that wherever nitrogen 

 has been applied in combination with other elements, the benefit 

 decreases in the third year, while in Plot 9 where it was applied 

 alone the benefit in the third year increases distinctly. This is 

 partly explainable in the larger yields of the former plots last year, 

 thus bringing them more strongly under the operation of the bien- 

 nial bearing habit. 



Also the difference in yield between 8 and 9 may be traced di- 

 rectly to a deficit of at least 1,000 pounds that occurred this year 

 in Plot 8 of Experiment 220. This deficit was not due to the ab- 

 sence of apples on the trees. On the contrary an excessive num- 

 ber of fruits were formed on this plot, despite its heavy crop of last 

 year, and this very fact, coupled with the excessive foliage and ex- 

 treme drought of the current season, almost prevented development 

 in the apples. Plot 9 was subjected to similar conditions but to 

 a lessened degree in every way. Its original set of fruit and its 

 foliage were less and its moisture situation is scarcely as severe 

 as that of Plot 8. The indications on the present year's crop are 

 that the plots receiving all three elements will regain much of their 

 loss in relative position. 



In Table III we have another set of results from the fertilizer 

 portions of Experiments 336, 338 and 339, which have been running 

 for two years only. The applications are the same as in the experi- 

 ments ajjove. 



