New YorkK AGRICULTURAL EXPERIMENT STATION. 341 
stable manure gives distinct advantages for forcing crops aside 
from the available plant-food which is thereby added to the soil. 
In this crop the yield, as a rule, increased with each increase of 
manure, although not to a corresponding degree. With succeed- 
ing crops the yield, where the larger amounts of manure were 
used, oftentimes was less than that obtained with smaller 
amounts, as we shall see later. The soils which received manure 
only, at the rate of one-third their bulk, and which were packed 
firmly into the boxes, gave a better yield than any other por- 
tions; better even than those which received as much or more 
manure combined with commercial fertilizers. Less increase 
was seen with the corresponding loose soil, but even in this 
case the yield on the sandy loam exceeded that where more 
manure was used in combination with commercial fertilizers, 
and on the clay loam it exceeded that obtained with an approxi- 
mately equal amount of manure combined with the commercial 
fertilizers. 
The relative value of the different forms of the nitrogenous 
commercial fertilizers shown on the soils where no manure was 
used did not hold good when these fertilizers were combined 
with the stable manure. The addition of even 5 per ct. by weight 
(114 per ct. by bulk) of the manure obscured the individual action 
of the nitrogenous commercial fertilizers. Those who wish to 
follow the results in this line more fully are referred to the data 
set forth in Tables V to IX. 
Where manure was used the crop on the sandy loam was very 
much below that obtained with similar treatment on the clay 
loam. The soils which received no manure show an interesting 
exception to this with this crop but not with succeeding crops. 
See Tables V to IX. 
SEASON OF 1899-1900. 
The experiments in 1899-1900 were conducted on the same 
general plan as those of the preceding year. The few changes 
mentioned below were introduced. The same soil was used. It 
was prepared by dumping the box, adding to the soil the stable 
manure or commercial fertilizer, if any was required, and after 
