Experiments in Warren Field, Crawley- Mill Farm, Woburn. 329 
fertilisers, in which the phosphates for the greater part are 
actually soluble in water. 
In order to save the reader the trouble of referring to this 
volume, the diagram on p. 330 has been transcribed, which will 
show at a glance the kinds and quantities of the manures which 
were employed in raising a crop of Swedish turnips on the 
6 acres under experiment, and the general arrangement of the 
experimental plots, each plot occupying one-fourth of an acre. 
The whole of the swede crop, varying in the different experi- 
ments from 18 tons to 26^ tons, in round numbers, was carted 
off the land in the autumn of 1880, and no further manure of 
any kind will be applied to any of the 24 quarter-acre plots in 
the course of the four years' ordinary rotation. 
A good seed-bed ^having been procured by suitable cultiva- 
tion, ihe barley was drilled in on the six acres on the 14th and 
15th of April, 1881, and red clover-seed was drilled between the 
barley on the 28th of May. 
In July the barley in Warren-field, on the end part of 
Section A farthest away from the roadway, looked rather thin 
on the dung-plots Nos. 8, 9, and 10. As far as could be judged, 
the barley was injured on those plots to the extent of about one- 
third. The injury was due partly to the damage done by wire- 
worms in the early part of the year, and partly to the circum- 
stance that the land where the barlty was damaged is rather 
low and had been flooded a good deal during the two previous 
years. The clover also did not look so healthy on these wet 
places as in other parts of the field. On the 2nd of August I 
took the following notes on the spot. 
In Section A, plot 1 (ground coprolites), the barley was 
decidedly thinner and less luxuriant than on plot 2, manured 
with dissolved coprolites. On plot 2 the barley appeared 
rather better than on plots 3, 4, 5, and 6. On plot 12 (guano 
and dissolved coprolites) the barley appeared not much better 
than on the unmanured plot 6. 
In Section B, plot 1 (ground coprolites), barley better than on 
plot 1 in Section A. 
Plot 2 (dissolved coprolites), barley not so thick as on the 
corresponding plot in Section A. 
No great apparent difference in the barley on plots 3, 4, 5, 
and 6. 
On plot 7 (bone-meal), the barley was decidedly better than 
on the unmanured plot (6), except upon a patch where the barley, 
for some reason or other, was very light. 
On plot 8 (dung, 20 tons per acre) the barley was visibly 
stronger than upon all other plots. 
Plot ll (chalk), barley rather better than on No. 12. 
