New York AGRICULTURAL EXPERIMENT STATION. 351 
table where the yield when commercial fertilizers only were 
applied is compared with the yield on similar portions of soil to 
which stable manure was added at the lowest rate tested in this 
work, 5 per ct. 
TABLE X.—SUMMARY OF RESULTS WITH COMMERCIAL FERTILIZERS WITH- 
OUT MANURE AND WITH FIVE PER CT. OF MANURE. 
Check+=1, treated plants= 
es 





On clay loam. On aandy !oam. 
SS ate = SSE ee , a re ar =. be arene “enon Y 
With head With loose With head With loose 
Treatment. lettuce. lettuce. lettuce. lettuce. 
Crop oF 1898-1899: From To From To From To From To 
Commercial fertiliz- 
ers without ma- 
NANG Sevilla ae Og 2.25-3.31 1.31-3.30 
Commercial fertiliz- 
ers with 5 per ect. 
Dianure? .....2.... 12.44—-138.31 3.63-3.99 
Crop or 1899-1900: 
Commercial fertiliz- 
ers without ma- 
PNUTVEOMS hss SAE coe we 2.02-2.82 1.50-2.37 0.45-2.33 1.084. 34 
Commercial fertiliz- 
ers with 5 per et. 
PC a es oid v nls 6.01-6.44 4.47-4.74 18.89-26.67 12.45-13.27 
Crop or 1900-1901: 
Commercial fertiliz- 
ers without ma- 
PIT ee One o2c8 ote 2 1.46-1.82 1.66-1.83 1.00-1.58 1.10-1.75 
Commercial fertiliz- 
ers with 5 per ct. 
RAPPER T Ge ons dts. «0 4.04-5.08 6.00-7.58 2.48-3 .55 2.45-2.52 

1 The value of the check varies with the different crops and with the different soils. See 
Tables V to [X. 
2'‘~he manure was added to these portions of soil at the rate of 5 per ct. by weight for the 
first crop and 5 per ct. by bulk for succeeding crops. See Table II. 
In every trial of these commercial fertilizers alone they proved 
entirely madequate for bringing a crop to maturity in sufficiently 
short time to be profitable. This held true not only for the earlier 
crops but also for the last crop where the cumulative effect of 
the applications for the two previous years had the best chance 
to appear. Had the tests been made with garden loam enriched 
in previous years by liberal applications of manure or with sod 
and manure compost such as gardeners usually prepare for fore- 
ing lettuce, perhaps the results would have been much more — 
favorable to commercial fertilizers alone, but for the kind of 
soils which were used in these experiments the evidence is con- 
