New York AGRICULTURAL EXPERIMENT STATION. 489 
TABLE [X.— COMMERCIAL FERTILIZERS vS. STABLE MANURE FOR LETTUCE 
ForRcING. 
Per ct. of ingredients. 
Jara eS 
firmness. — 
100. 
No. 
of soil. 
planting till ma- 
head in ounces. 
marketable. 
turity. 
Seale of 100. 
Date of seed plant- 
ing. 
Average days from 
and 
Sandy loam. 
Commercial fertili- 
zers 
Average weight per 
Per cent of heads 
Texture, appearance 
Tip-burn.— Scale of 
Clay loam. 
Manure. 

1897. 
Nov. 23 92.9 7.94 97.2 
Nov. 23 89.3 7.42 97.1 
Nov. 23 95.9 7.50 100.0 
Nov. 23 82.5 8.57 98.5 
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Sor 
=r) 
fee Qee00 2 0 
We i 0 66% 383% 
pout 
ou 
for) 
fr) 
ome 
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oo 
wo 
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~* + * 
CS =} 
GO Oe 
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woo Ore 
—————$—————__ — — 

Excellent lettuce was produced on the sandy loam with com- 
mercial fertilizers instead of stable manure. See Soil 8. In firm- 
ness, texture and general appearance it surpassed the lettuce which 
was grown on the sandy loam with stable manure instead of the 
commercial fertilizers. See Soil 15. Plate XLVI shows an average 
head of lettuce from each of these soils. On Soil 15 the lettuce 
was badly injured by tip-burn, while on Soil 8 it was practically 
free from the tip-burn, but it suffered somewhat from rot (Botrytis), 
“more so, in fact, than did the lettuce on Soil 15. 
With the clay loam the results were quite the opposite of those 
which were obtained with the sandy loam. On Soil 16, where 
stable manure was used instead of commercial fertiizers, the let- 
tuce was larger, firmer, much better in appearance and about 13 
days earlier than it was on Soil 7, which received commercial 
* Acid phosphate 600 lbs. per acre, sulphate of potash 400 lbs. per acr e,. and 
nitrate of soda 366 lbs. per acre. 
+ No commercial fertilizers used. 
8 Mr. Wright Rives, who forces lettuce extensively near Washington, D. C., 
states in a letter to the writer, “I have tried nitrate of soda several times 
and it has always produced bad results, as it keeps the ground on top and 
under the lettuce damp, which is fatal, as it produces rot. For lettuce the 
soil must be such that it will dry quickly on top but keep moist below. I 
make my soil of 214 to 3 parts of sod to 1 of manure and to this I add about 
one-third of bank sand.” 
