28 STATE HORTICULTIRAL SOCIETY. 



Less 2h" 23.4-23.2" Over 23->" Total 



Sulphate of ammonia 5.5 43.4 184.7 233.6 



Nitrate of soda 5.3 43.4 152.5 201.2 



Check 3.9 25.1 31.1 60.1 



Acid phosphate 35.4 91.2 S2.S 209.4 



Complete fertilizer 11.1 103.7 288.2 403.0 



Nitrogen and phosphorus (1 yr.) 3.3 90. 191.5 299.2 



The yields from the two nitrogen plots and the acid phosphate plot may 

 be considered practically the same as the differences are not greater 

 than one might naturally expect had these three plots been given the 

 same treatment. They have yielded about three and one-half times 

 as much as the check; while the nitrate-phosphate plot, receiving fertilizer 

 only one year has produced about five times as much as the check and 

 the complete fertilizer plot has produced about seven times as much. 



Evidently nitrogen and phosphorus are of about equal value in pro- 

 ducing yields in this orchard but should be combined to jiroduce the 

 most satisfactory results. We have no way of knowing whether the 

 potash in the complete fertilizer plot was responsible for any gains in 

 that' plot. It would seem though if the nitrate-phosphate plot had been 

 fertilized two years that a larger yield might have been expected and 

 that this would leave little differences between the yields of this plot 

 and the complete fertilizer one. 



This is the first time (in observations covering seven or eight years) 

 that I have been in intimate touch with an experiment or even a demon- 

 stration where acid phosphate has been responsible for decided increases 

 in yield when used alone. Quite commonly, a nitrate-phosphate com- 

 bination will greatly outyield nitrogen alone, but seldom has phosphorus 

 been definitely known to give such results as are here recorded. 



The percentage of fruit of each grade for each of the plots more clearly 

 shows differences between plots and is here presented. 



Less 2}4" 2}i to 214" Over 23^" 



Sulphate of ammonia 2.3% 18.6% 79.1% 



Nitrate of soda 2.6 21.5 75.8 



Check 6.5 41.7 51.8 



Acid phosphate 16.9 43.6 39.5 



Complete fertilizer 2.7 25.6 71.6 



Nitrogen and phosphorus(l yr.). . 5.9 30.1 64.0 



71% to 79% of the fruit in the plots receiving nitrogen for two years 

 grew to sizes two and one-half inches or larger and less than 3% of the 

 fi'uit from any of these plots was too small for a No. 2 or B grade, in 

 spite of the low rainfall. Slightly' over one-half of the fruit from the 

 check plot was large enough for a No. 1 or A grade. The acid phosphate 

 plot produced smaller fruit than any other plot. Less than 40% of it was 

 large enough for A grade, and 17% oi- more than one-sixth of it was too 

 small for a No. 2 or B grade. 



This again shows that phosphorus plot set a good crop of fruit, but 

 the acid phosphate evidently- did not supply the necessary stimulus to 

 grow as many fruits to full size. I feel certain that the addition of 

 nitrogen to this plot would have stimulated growth of these fruits result- 

 ing in much larger total yields and especially larger yields of apples 

 above two and one-half inches in size. 



