the Progress of English Agriculture. 
851 = 555 
As experiments to determine the value of the manure obtained 
1 the consumption of purchased foods obviously involved the 
i:essity of feeding animals under conditions in which the 
J inure could be collected with as little loss as possible, the 
hke of Bedford erected eight very complete feeding-boxes, in 
iiich the manure for the experimental barley and root crops, 
! will be explained further on, is made. 
The following is a description of the various experiments : — 
•' Stack-yard Field" which is devoted to the field experiments, 
h an area of nearly 27 acres. The soil consists of a very light 
1 m, to the depth of about 9 inches ; and the subsoil is almost 
jre sand. Samples of the soil and of the subsoil have been 
t;en in fifteen different places. In each case six samples, each of 
t; depth of 9 inches, or to a total depth of 54 inches, were taken. 
Plan of the Field Experiments. — It was considered important. Plan of the 
oecially with reference to valuations under the Agricultural ^'^''1 '^^P"'" 
])ldings Act, to add, if possible, to our knowledge of the '^'^^ ^' 
I nure value of both artificial manures and consumed feeding- 
sifs; and it was decided, therefore, both to compare the 
e!cts of the manure obtained by the consumption of selected 
fxhased foods with those obtained by artificial manures 
e [mated to supply the same constituents, and also to deter- 
tne the effects of dung, and artificial manuring substances, 
allied year after year, on the Woburn soil, and to compare 
t se with the results obtained for so many years, with the 
sie manures, on the very different soil at Rothamsted. 
^cordingly, 2^ of the 6 acres where wheat had been grown in 
1(6, after tares and turnips, each fed with cake, are devoted to 
tl continuous growth of wheat, and 2| acres to the continuous 
g wth of barley. In each case the area is divided into eleven 
p ts, of a quarter of an acre each ; and the description and 
qmtities of the manures applied per acre per annum, to both 
t. wheat and the barley, are as follows : — 
I t 1.— Unmanuied. Subdivision of 
2. — 200 lbs. ammonia-salts ; containing 50 lbs. ammonia. plot?. 
3. — 275 lbs. nitrate soda ; containing nitrogen = 50 lbs. ammonia. 
4. — 200 lbs. sulphate potass, 100 lbs. sulphate soda, 100 lbs. sulphate 
magnesia, 3^ cwt. superphosphate of lime. 
5. — 200 lbs. sulphate potass, ICO lbs. sul|)hate soda, 100 lbs. sulphate 
magnesia, Z\ cwt. superphosphate ; and 200 lbs. ammonia-salts, 
containing 50 lbs. ammonia. 
G.— 200 lbs. sulphate potass, 100 lbs. sulphate soda, 100 lbs. sulphate 
magoesia, Sj cwt. superphosphate ; and 275 lbs. nitrate soda, 
containing nitrogen = 50 lbs. ammonia. 
7. — Unmanured. 
8. — 200 lbs. sulphate potass, 100 lbs. sulphate soda, 100 lbs. sulphate 
magnesia, 3^ cwt. superphosphate ; and 400 lbs. ammonia-salts, 
containing 100 lbs. ammonia. 
