116 Report on the Field and Fcedivg Experiments at Woburn. 
will be seen by the low weight per bushel, which ranged from 
47 lbs. to 51 lbs. per bushel on the eleven experimental plots. 
The plots 5, 6, 8, and 9, manured with minerals and ammonia- 
salts, and minerals and nitrate of soda, ripened rather sooner 
than the rest ; next to them No. 4 ripened, then the two dung 
plots, 10 and 11, followed by plot 1 (unmanured), plot 2 
(ammonia-salts alone), plot 3 (nitrate of soda alone), and last 
of all, plot 7 (unmanured). A large portion of plot 7 was 
wheat transplanted in spring, which accounts for its ripening 
later than the rest of the field and yielding better than the 
unmanured plot. No. 1, upon which there were more blank 
places. 
On the whole, the plant on the experimental field was thin 
and unequal. 
The wheat stood decidedly the best on plots 8 and 9, manured 
with minerals and the large dressings of ammonia-salts, and 
with minerals and nitrate of soda. 
As far as I could judge there was only about half the plant 
on plots 2 and 3, as also on plots 8 and 9. 
Plot 10 (small quantity of dung) was about one-fifth short of 
plant in comparison with plots 8 and 9 and on plot 1 (unmanured) 
about one-sixth less. 
On plot 4 (minerals alone) the plant was better, but it was 
about one-eighth short in comparison with plots 8 and 9. 
On the second unmanured plot (No. 7), where the blanks had 
been filled up by transplanted wheat in the spring, the plant was 
about one-tenth short, and I noticed about the same deficiency 
in plot 11 (larger dressing of dung). 
The wheat on plots 5 and 6 (manured with minerals and 
smaller quantities of ammonia-salts and nitrate of soda) was 
thinner than on plots 8 and 9, upon which the plant tillered 
out better than upon plots 5 and G. 
Although the unpropitious season of 1880 and the attacks of 
the wire-worm to some extent interfered with the experiments 
on the continuous growth of wheat, the preceding tabulated 
statement of results nevertheless exhibits some interesting par- 
ticulars, upon which I may be allowed to make a few remarks. 
1. In the first place, it appears clearly that wheat cannot be 
grown profitably on the light soil of the experimental field at 
Woburn, and probably not on similar sandy soils elsewhere, for 
a limited number of years, even when artificial manures of 
the best description, containing in a readily available form both 
mineral and nitrogenous constituents, are applied to the land 
in much larger proportion than could be done in actual farm 
practice on account of the cost of the manures. 
2. In the next place it will be seen that well-made dung had 
