340 Report on the Field and Feeding Experiments at Wohurn. 
straw than plot 1, upon which the seeds, the preceding year, 
had been eaten off with 728 lbs. of decorticated cotton-cake. 
The wheat on plot 3 in the beginning of Julv looked very 
luxuriant and promised to produce the heaviest crop. The 
actual weighings of the produce showed that 9 bushels more 
corn and 15 cwts. more straw were produced when the fertiliz- 
ing constituents in the dung resulting from the consumption of 
7^8 lbs. of decorticated cotton-cake were supplied to the land 
in the shape of nitrate of soda, superphosphate, and potash, soda 
and magnesia-salts. 
The contrast in the appearance of the wheat-crop in the 
rotation experiments, and in the experiments on the continuous 
growth of wheat was most striking throughout the whole season. 
notation 2\o. 2. — Four acres as follow : 1877, roots : 1878, bar- 
ley, after mangolds fed on the land ; 1879, seeds ; 1880, wheat. 
The mangolds in 1877 were grown on : 
Plot 1. With dung, made from 3230 lbs. of straw as litter, 
5000 lbs. mangolds, 1250 lbs. wheat-straw chaff, and 1000 lbs. 
cotton-cake. 
Plot 2. With dung, made from 3230 lbs. of straw as litter, 
5000 lbs. mangolds, 1250 lbs. wheat-straw chaff, and 1000 lbs. of 
maize-meal. 
Plot 3. With dung, made from 3230 lbs. of straw as litter, 
5000 lbs. of mangolds, 1250 lbs. of wheat-chaff, and artificial 
manure containing two-thirds as much nitrogen and other con- 
stituents of the manure from 1000 lbs. decorticated cotton-cake, 
namely, 248 lbs. nitrate of soda, 100 lbs. bone-ash (made into 
superphosphate), 62^ lbs. sulphate of potash, and 65 lbs. sulphate 
of magnesia. 
Plot 4. With dung, made from 3230 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. nitrate 
of soda, IG^ lbs. bone-ash (made into superphosphate) 7 lbs. 
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. of 
decorticated cotton-cake, namelv, 124 lbs. of nitrate of soda, 
applied as a top-dressing on the 20th of March, 1878. 
The barley was drilled on the 16th of March, and the crop cut 
on the 15th of August, the produce from plots 1 and 3 were 
carted and stacked on the 28th of August, and that from plots 
2 and 4 on the 2nd f)f September. The barley was threshed out 
on the 21st and 22nd of October. 
The produce of the four rotation-barley acres is given in the 
following Table: 
