24 



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

 directly to a deficit of at least 1,000 lb. that occurred this year in 

 plot 8 of Experiment 220. This deficit was not due to the absence 

 of apples on the trees. On the contrary an excessive number of 

 fruits were started on this plot, despite its heavy crop of last 3^ear, 

 and this very fact, coupled with the excessive foliage and extreme 

 drought of the current season, almost prevented development in the 

 apples. Plot 9 of course 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 hardly as severe as 

 that of plot 8. Thus, while some of the present results are un- 

 doubtedly entitled to the rank of "posers," yet they are not entirely 

 beyond partial explanation at least; and at any rate they should 

 not be permitted to cloud the main facts, which are given in the 

 paragraph above. 



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 above. 



TABLE III. 



Influence of Fertilizers on Yield and Color. 



Expts. 336, 338, 339. (a) Yields in Pounds, 1908-9. 





I 



Check 



2 

 NP 



3 



N K 



Chtck 





6 



N PK 



7 



Check 



8 



Manure 



Lime 



10 

 Check 



1908, ist yr. 



562 



860 



748 



1118 



846 



2178 



1067 



2338 



3111 



2748 



Per cent. 

 Benefit!, 





15.1 



-19.8 





-23.2 



100.9 



46.7 



42.1 





1909 Totals, 



1087 



6435 



6367 



2502 



3803 



7212 



2436 



4600 



2349 



1720 



Per cent. 

 Benefit, 





312.7 



213.6 





53-3 



193-4 





109.7 



19.9 





1909. (b) Color per cent, of apples colored ^ or more. 



Ave. per 

 cent. Color, 



57.2 



40.- 



39.8 



49-4 



46.5 



38.0 



49-7 



49.0 



S0.3 



54.8 



Per cent. 



Benefit, 





-14.6 



-12.2 





-3. 



-11.6 





-2.4 



-2.8 





In Tables II and III we have had results from various combi- 

 nations of fertilizer elements, as well as some from certain mate- 

 rials used singly. Those results being direct from the trees may be 

 considered a close expression of the values thus far of the various 

 combinations used. In many cases, however, we may wish to know 

 which is the more active element in a given combination and ap- 

 proximately what values are to be assigned to each of the elements 

 in it. For example, in plot 2 of Table II we find a benefit of 78.1 

 per cent, resulting from an application of nitrogen and phosphate. 



^The results of the first 3^ear were obviously unaffected by the fertilizer 

 treatments, but they are included for the light they throw on some of the 

 results of the second year, notably those in plots 2, 3 and 6. 



