226 
Tobacco as a Farm Crop for England. 
Q. — Did your use of manures in various kinds and quantities 
produce different results? 
A. — Yes. I believe that the plot manured with bats' guano 
was least, and that manured with wood-ashes most successful. 
Q. — Did jou observe any marked difference in the times of 
ripening and in the colour of the various plants ? 
A. — The difference was very pronounced in the growth of 
yellow tobacco, sold under the name of " Kentucky." That 
manured with bats' guano was much greener and did not ripen 
nearly so fast as the other ; and when it was dried, green spots 
showed on the leaves, and the tips were of a dull reddish- brown 
colour, instead of being bright yellow like the rest of the leaf. 
The first intimation to me that the leaves of tobacco ever 
became absolutely yellow in a growing state was when I saw 
my own Kentucky plants turn yellow, while all the others 
remained green. The idea then occurred to me that I might 
fix the colour as described in the American reports. I had 
a very limited quantity of Kentucky, which was the only kind 
that turned decidedly yellow, some being planted in plot 4, 
some in plot 6, as you can see in the Plan (p. 223), the plots 
being separated by footpaths. 
The difference between the Kentucky in these two plots was 
very marked. The Kentucky in plot 6 was treated in all ways 
similarly to plot 4, with the exception of the growing plants 
being manured with bats' guano ; but while the Kentucky in 
plot 4 was yellow, that in plot 6 was green. Two plants left 
till October 13th in plot 6 were not as yellow as those in plot 4 
on the same date in September. 
This conclusively proved to me that tobacco may be over- 
manured. I am inclined to believe that my tobacco was gene- 
rally over-manured, and particularly where bats' guano was 
applied (though, had that manure alone been applied, the result 
might have been successful) ; but I might not have discovered 
this important fact had it not been for the natural tendency 
of the so-called Kentucky tobacco to turn yellow, following its 
natural bent in plot 4, but thwarted by the application of manure 
in plot 6. We owe this discovery indirectly to Messrs. Carter 
& Co., who with praiseworthy energy sent over to America as 
soon as the subject of tobacco culture in England was broached, 
and secured every possible variety, including the above-men- 
tioned Kentucky plants. 
Q. — Do you mean me to infer then that, except in the case of 
yellow tobacco, you could not tell whether the plants were over- 
manured or not ? 
A. — In the other tobaccos I think I should have been led to 
suspect it, but I could not myself, and I doubt whether any one 
else could, have stated as a fact, judging from their appearance, 
