FLUCTUATIONS OF VIKI.D :I7 



complete artitici.'il maiuire containing varvini; i|iiaiititic.s of 

 nitrogen ; and Plot 10, which receives nitrogen only. 



Considering the unmanured plot fh-st, it will l»e seen thai 

 while there is evidence of a small decline in pioduction t<>r the 



ROOD lb. 



Plot 2. 



::;i.piot7. 



- Plot 6 



Plot 10. 



"Plot 3. 



1844-51. 1852-61. 1862-71. 1872-81. 1882-91. 18921901 



Fk;. 2.-Broa(n)alk Wlu-.it. Total rr.Mln. . . 



first eighteen years, yet the crop has been practically constant 

 (hiring the last forty years. The fluctuations during this period 

 are in the main due to season, and correspond very closely with 

 those of the completely manured Plots and 7. For example, 

 there was a considerable drop during the decade 1872-sl, a 

 period of notoriously bad seasons ; then followed a consi(leral)le 



