Rotation Experiments. 
251 
almost a dead failure, only 7 bushels per acre being given, but 
this same treatment when it received (in 1905) 1 ton of lime to 
the acre in addition produced 43' 7 bushels (5aa). Plot 5b, 
which had 2 tons of lime in 1897, only yielded 29‘6 
bushels. As before, the heavier application of sulphate of 
ammonia with minerals gave insignificant crops when no lime 
was used (8a, 8b), but 8aa, with lime (2 tons) last put on in 
1897, yielded 37‘2 bushels. It is evident from this that, 
whereas in the case of wheat the application of 2 tons of 
lime per acre in 1897 seems to be still sufficient and not to 
require renewal, in the case of barley the lime put on in 1897 
seems to be working itself out, and benefit to accrue from its 
repetition. 
Comparing plots 10a and 11a it would seem that potash is 
more required than phosphates. Rape dust did not do nearly 
as well as farmyard manure, the latter producing the heaviest 
crop of the whole series, viz., 45'8 bushels, and showing a 
marked difference to the wheat crop similarly manured. 
The corn was valued on a basis of 30s. per quarter of 448 lb. 
As a whole the barleys were not good. The best sample (5aa) 
would alone go for malting. The next few were judged as just 
passing for low-class malting purposes, and the remainder were 
only fit for giunding. Nitrate of soda, as usual, gave the lowest 
weight per bushel (50 lb.), but that of the rape dust sample was 
54'8 lb., and of the farmyard manure corn 53 lb. per bushel. 
Nitrate of soda also produced the largest amount of tail corn. 
Sulphate of ammonia with mineral manures and lime gave 
nearly as much straw as did nitrate of soda with minerals. 
Rotation Experiments {Stackyard Field). 
The new scheme for these experiments came first into 
operation in 1904, in which year the root crop on the upper 
half of the area was fed off by sheep, barley following in 1905 
on Rotation IV., the other rotations duly coming into regular 
order. In this series the root crop was fed off on the several 
plots by sheep receiving respectively : — Plot 1, decorticated 
cotton cake ; plot 2, maize meal ; plots 3 and 4, neither cake 
nor corn. The cropping for 1907 was : — 
Upper Half. Rotation I., Green crop (mustard) ; Rotation 
II., Swedes ; Rotation III., Barley ; Rotation IV., Wheat. 
In 1907 the lower half of the area also came under regular 
rotation experiment. While, on the upper half, the object 
sought to be attained was to ascertain the difference of 
manurial value obtained by the consumption of, in the one 
case, decorticated cotton cake, and in the other, of maize meal, 
by sheep feeding off roots on the land, on the lower half the 
object was to ascertain what would be the difference of 
