Report on the Field and Feeding Experiments at Wohurn. 133 
The difference in the weight, as ascertained by weighing the 
whole of the produce in one operation on an ordinary weigh- 
bridge and measuring out and weighing each bushel separately, 
it will be seen, does not exceed 1;^ lb. I select this plot for 
illustration because it showed the greatest difference in these 
weights on any one plot. In some cases the total weights, as 
ascertained on a rough weighing machine in one operation, and 
by adding the weights of the several bushels as determined on a 
more delicate weighing-machine, differed not more than j or J lb. 
The table on page 134 shows at a glance the treatment of 
each plot as regards manure, and the result of the harvest of 1879. 
1879 was such a cold and wet season that the wheat in many 
places, especially on heavy land, did not fill well, and turned out 
a more or less complete failure. Thus in Mr. Lawes' experiments, 
the continuously unmanured plot produced scarcely more than 
4 bushels of wheat per acre ; and on all the manured plots the 
produce sank down to an abnormally low figure in comparison 
with the average produce in fairly good corn-growing seasons. 
I have therefore some hesitation in making any comments 
on the results of the wheat harvest on the experimental field 
at Woburn in 1879, and shall not attempt to reconcile any 
anomalies which may be due to Inequalities in the soil of the 
field, partial destruction of the plant by wire-worm, blight, and 
other circumstances over which the experimenter has no control. 
Nevertheless, the experiments on the continuous growth of 
wheat in 1879 present some interesting features upon which. 
I may be allowed to dwell for a few moments. 
Comparing the produce of the unmanured plot 1 with that of 
the preceding year, it will be seen that in 1878 the weight of 
dressed corn per acre was 943 lbs., as against 490 lbs. in 1879 ; 
and that, whereas the bushel on plot 1 weighed 60 lbs. In 1878, 
it weighed only 48.^ lbs. in 1879. In the produce of straw on 
plot 1 in 1879 there is a falling off of 6 cwts. 2 qrs. and 18 lbs., 
as compared with the produce in straw in 1878. The second un- 
manured plot, No. 7, has again produced less corn than plot No. 1. 
This is now the third year In which this has been observed. 
Thus, in the years 1877-1879, the two unmanured plots, 
1 and 7, yielded respectively ; — 
Plot l (trnmanured). 
Plot 1 (Unmanured). 
Dressed 
Corn. 
Weight 
per 
Bushel. 
Dressed 
Corn. 
Weight 
per 
Bushel. 
1877 
1878 
1879 
Bushels. 
15-8 
10-1 
lbs. 
61-8 
60 
48J 
Bushels. 
201 
12 
lbs. 
61-1 
58-6 
50-0 
