148 Report on the Field and Feeding Experiments at Wohurn. 
Plot 2. With dung, made from 172S lbs. of straw as litter, 
5000 lbs. mangolds, VlhO lbs. wheat-straw chaff, and 1000 lbs. 
of maize-meal. 
Plot 3. With dung, made from 1728 lbs. of straw as litter, 
5000 lbs. mangolds, 1250 lbs. wheat-straw chaff, and artificial 
manure containing two-thirds as much nitrogen and other 
constituents of the manure from lOOO lbs. decorticated cotton- 
cake, namely, 2,48 lbs. nitrate of soda, 100 lbs. bone-ash (made 
into superphosphate), (52^ lbs. sulphate of potash, and 05 lbs. 
sulphate of magnesia. 
Plot 4. With dung, made from 1728 lbs. of straw as litter, 
5000 lbs. mangolds, 1250 lbs. wheat-straw chaff, and artificial 
manure containing as much nitrogen and other constituents as 
the manure from 1000 lbs. maize-meal, namely, 80 lbs. of 
nitrate of soda, K!^ lbs. bone-ash (made into superphosphate), 
7 lbs. of sulphate of potash, and 11 lbs. sulphate of magnesia. 
The succeeding barley on plots 1, 2, and 4 was grown without 
artificial manure ; on plot 3 with artificial manure containing 
one-third as much nitrogen as the manure from 1000 lbs. decor- 
ticated cotton-cake, namely, 124 lbs. of nitrate of soda, applied 
as a top-dressing in May. The barley was drilled in at the rate 
of 9 pecks per acre on the 7th and 8th of April, 1879, and the crop 
was cut on the 15th of September, carted and stacked between 
the 4th and 7tli of October, and threshed in the first Aveek of 
November, when the straw and chaff were weighed at once in 
the field, and the corn was placed in carefully labelled bags 
in the granary. The corn was weighed and measured on the 
19th of November, 1879, and the results were obtained as 
shown in the table on page 147. 
It will be seen that the barley-crop on plot 1, after mangolds, 
manured with dung from 1000 lbs. of decorticated cotton-cake, 
produced about 2h bushels less corn than on plot 2, which was 
manured with dung resulting from the consumption of 1000 lbs. 
of maize-meal. The difference is not great, but inasmuch as 
decorticated cotton-cake contains much more nitrogen than 
maize, and furnishes a richer dung than the latter, I naturally 
expected that the barley-crop would turn out better on plot 1 
than on plot 2. The actual results did not fulfil this expecta- 
tion, and I can only account for this somewhat unexpected result 
by the fact that during the past very wet season we had at times 
heavy thunder-storms and heavy rains, in consequence of which 
the water flowed towards the lowest end of the experimental 
field, and stood occasionally for some time upon a part of the 
acre of barley grown after mangolds manured with dung Irom 
decorticated cotton-cake. 
The nitrate of soda on plot 3 docs not appear to have had 
