242 
Report of the Field and Feeding Experiments 
responding to 50 lbs., or to 100 lbs. ammonia per acre. It is 
especially remarkable that, when these nitrogenous manures 
were used alone, that is without mineral manure, the ammonia- 
salts gave 8^ bushels more barley than the nitrate of soda con- 
taining the same amount of nitrogen. Nitrate of soda is more 
subject to loss by drainage than are ammonia-salts ; and the 
result may be partly due to more washing out in its case ; but 
probably in a greater degree to the nitrate having been sown 
later than the ammonia-salts, and possibly unfavourably late for 
the soil and season, compared with the sowing of the ammonia- 
salts. 
The dung for the barley not having been applied until the 
spring, it was not subject to the same risk of washing out, and 
loss by the winter rains, as that for the wheat. Still, the dung 
produced no effect on the barley when applied in quantity esti- 
mated to contain nitrogen corresponding to 100 lbs. of ammonia 
per acre ; the produce being only 18 bushels; whereas, ammonia- 
salts (with minerals), in quantity equal to 100 lbs. of ammonia, 
gave 52^ bushels ; or nearly three times as much. Lastly, dung 
containing nitrogen corresponding to 200 lbs. of ammonia per 
acre gave only 26^ bushels of barley. 
Thus, the results of the first year's experiments, on this light 
and porous soil, have shown, with both wheat and barley, very 
striking effects of nitrogen applied in the soluble condition of 
ammonia-salts or nitrate of soda. 
The Experiments on Rotation. 
Stack-yard Field. — Rotation No. 1 ; four acres as under. 
1877 Seeds. 
1878 Wheat. 
1879 Roots. 
1880 Barley. 
The four acres of clover and ryegrass have been fed-off by 
sheep during the summer, and the land is now sown with wheat. 
On one acre 728 lbs. of decorticated cotton-cake have been con- 
sumed ; on a second acre the same quantity of mai/e meal ; and 
the third and fourth acres were separately eaten ofl" without any 
purchased food. On one of these, artificial manure, supplying 
nitrogen and other constituents, equal to those estimated to be 
contained in the manure from the 728 lbs. of consumed cotton- 
cake, and on the other equal to those in the manure from the 
728 lbs. of consumed maize-meal, will be applied for the wheat 
in the spring. The crop of seeds being better on one side of 
the land than on the other, the sheep having no purchased food 
