of their continuance; 4 plots (14, 15, 16, and 17) were, 

 however, only brought in in 1858, and 2 others (19 and 

 20) only in 1872. The total number of plots is now 

 20, but 3 of these have for many years been divided, 

 making in fact 23 plots in all. During the first 19 

 years, first crops only were removed as hay, the second 

 crops being either consumed by sheep on the land, or 

 cut and spread upon it. Since that time, second (and 

 sometimes third) crops have as a rule been cut ; some- 

 times removed as hay, and sometimes only cut and 

 spread on the land. Further particulars on these points 

 will be found in the paragraphs at the head of the 

 Table of manures and produce given in the "Memo- 

 randa," 



In the " Memoranda " there is annually recorded, the 

 manuring and produce of each plot in the immediately 

 preceding season, the average amounts of produce over 

 the first 10, the second 10, and the first 20 years, from 

 the commencement, when first crops only were removed ; 

 also the average amounts of the first crops, the second 

 crops, and the total, over the succeeding years. The 

 description of manures given to the left of the columns, 

 together with the heading and the foot-notes, gives a 

 complete account of the manuring of each plot from the 

 commencement. There is also given a statement of the 

 special treatment of portions of the plots in recent 

 years, by the application of chalk, or of lime, or of both. 



2. The Composition, Botanical and Chemical, of the 

 Crops. 



4 sample of the produce of each plot, and of each 

 crop if more than one, is taken each year. A portion of 

 this is preserved for nitrogen determinations, or other 

 chemical examination, and 2 portions are dried at 100, 

 the dry matter determined, and then burnt to ash, the 

 ashes being preserved. 



Nitrogen determinations have been made in the 

 mixed herbage of most of the plots, in most of the 

 years ; in a few cases in mixed year samples only ; but, 



