New York Agrioul^tural Experiment Station. 



351 



table where the yield when eouimercial 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. — Summaby op Results With Commercial Fertilizers With- 

 out Manure and With Five Per Ct. of Manure. 



Checki=l, treated plant8= 



Ou clay loam. On sandy loam. 



With head With loose With head With loose 



Treatment. lettuce. lettuce. lettuce. lettuce. 



Crop of 189S-1S99: From To From To From To From To 



Commercial fertiliz- 

 ers without ma- 

 nure 2.25-3.31 1.31-3.30 



Commercial fertiliz- 

 ers with 5 per ct. 



manure^ 12.44-13.31 3.63-3.99 



Crop of 1899-1900: 



Commercial fertiliz- 

 ers without ma- 

 nure 2.02-2.82 1.50-2.37 0.45-2.33 1.08^.34 



Commercial fertiliz- 

 ers with 5 per ct. 



manure^ G. 01-6. 44 4.47-4.74 18.89-26.67 12.45-13.27 



Crop of 1900-1901: 



Commercial fertiliz- 

 ers without ma- 

 nure 1.46-1.82 1.66-1.83 1.00-1.58 1.10-1.75 



Commercial fertiliz- 

 ers with 5 per ct. 

 manure^ 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 \rith the different soils. See 

 Tables V to IX. 



2 The 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 tliey proved 

 entirely imadcquate for hringing a crop to maturity in sufficiently 

 short time to he profltaUe. 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 forc- 

 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- 



