31 



TABLE VIII. 



Influence of Cultural Method on Yield, With Fertilization. 



Expts. 217, 2i8, 219. Young- Orchards. 





2 &3. 

 Clean Tillage 



5 & 6. 

 Tillage and 

 Cover Crop. 



8 &9. 

 Sod Mulch. 



11 & 12. 



Sod. 



1908 Yields, 



1909 Yields, 



9193 lb 



14554 



9512 lb 



12443 



I 1203 lb 

 12571 



10351 tb 



12823 



Totals, 



Ratios, 



23747 

 108.2 



21955 

 100. 



108.3 



23174 

 105.6 



Expt. 221, Mature Orchard. 



1908 Yields, 



1909 Yields, 





6684 

 28297 



1035 I 1 

 22545 1 



Totals, 



Rations, 



1 



34981 

 1 106.3 



32896 1 

 100. 1 



As compared with Tables VI and VII, these results show a 

 marked leveling effect from addition of fertilizers. In other words, 

 the applications of plant food have tended strongly to reduce or even 

 nullify the differences due to cultural methods. This effect was also 

 very distinct in the appearance of the trees in the field. 



A consecutive increase in productiveness following the addition 

 of plant food has been very marked in some cases. For example, 

 the mulched plots of Experiment 221, receiving manure and com- 

 mercial fertilizer, in 1907 produced 3,050 pounds of fruit ; in 1908, 

 as seen in the table, they produced 10,351 pounds; and in 1909, 

 22,545 pounds. And this occurred on plots receiving no tillage. 



Fertilization for Different Cultural Methods. 



The question often arises as to what is the best form of fertil- 

 izer to accompany different cultural methods. This question is par- 

 tially answered by the data in Table IX. 



TABLE IX. 



Effect of Manures on Yield. 



Expts. 217, 218, 219. 



Season 1908-9 (2nd & 3rd Yr.) 



Unfertilized. 



Stable Manure 

 12 T. per Acre. 



Com. Fertili- 

 zer, 30-60-100 

 Lb. per Acre. 



Sod ^lulch, 



Sod, 



13698 lb 



14550 

 15702 

 1 1 706 



21605 tt) 

 20582 



23022 tb 

 20681 

 20408 

 17929 



Totals, 



55656 

 100 



90637 

 162.8 

 no. 5 



82040 

 147.4 

 100. 



Expt. 221. 



Sod Mulch, 



33II9 



2I09I 



319^4 

 35396 





Totals, 



54210 



100. 



67320 



124-3 

 105.4 



63S72 

 117. 8 

 100. 



