98 Field Experiments on Swedish Turnips. 
The dung and dissolved coprolite plots were more advanced 
than the dung and ground coprolite plots. 
On the 4th of August I found the differences in the appear- 
ance of the swedes on the various plots, pretty much the same as 
on the 24th of July. 
The weather being showery in the summer of 1880 was very 
favourable to the growth of roots. 
On the 2nd of October I took the following notes on the 
field :— 
Ground coprolite plots almost as good as bone-meal plots, 
and dissolved coprolite plots bigger roots than in the undis- 
solved coprolite plots. 
Redonda phosphate plots rather better than the ground copro- 
lite plot, No. 1a. 
Dissolved bones ; good roots, growing vigorously. 
Unmanured plots ; roots healthy, smaller than on manured 
plots. 
Raw bone-meal much behind dissolved bone-meal. 
The roots on plots manured at the rate of 20 tons per acre 
are large, leaves very luxuriant and still quite fresh. 
On the plot manured with half a dressing of dung and dissolved 
coprolites, fine roots and better than on the plot manured with 
dung and ground undissolved coprolites. 
The roots on the plots dressed with precipitated phos- 
phate appeared as good as those manured with dissolved 
coprolites. 
The swedes manured with chalk were better than the un- 
manured swedes ; the tops had a lighter green colour than on 
the rest of the experimental plots. 
The guano and superphospate plots were still vigorously 
growing, and had large bulbs and luxuriant leaves. 
There was an even and healthy crop on all the plots. On the 
unmanured plots the roots were smaller than on the manured, 
but quite healthy. 
The swedes were pulled at the end of November and in the 
first week in December, topped and tailed and weighed in a 
clean condition, as the land was in a good condition for pulling 
the roots with but little adhering soil. 
The following table (p. 99) shows the results of the weighings. 
I do not attach any value to the weight of the tops, for some 
of the duplicate plots were got up after a sharp frost and more 
than a week later than the corresponding plots, hence the dis- 
crepancies in the weights of the tops. 
