
EFFECT OF NITROGENOUS FERTILIZERS. | IIS 
the yield of the legumes is but little affected by their use, has 
long been known. The power of the legumes to utilize the free 
nitrogen of the air, though a comparatively recent discovery, is 
already well known by farmers as well as scientific investiga- 
tors. The increase in the protein content of cereals and 
grasses generally, caused by nitrogenous fertilizers, is not 
widely understood. Indeed, we are not familiar with any pre- 
vious investigations in which it has been shown upon any con- 
siderable scale ; and certainly it is not current in writings upon 
the use and effect of nitrogen in fertilizers. ; 
NUMBER, GENERAL PLAN, AND GENERAL CLASSIFICATION 
OF THE EXPERIMENTS. 
. Che following table gives a general classification of the ex- 
periments showing the kinds of crops thus far experimented 
with by the Station, the kind of experiment, whether “ soil 
test” or “ special nitrogen,” the years in which the experi- 
ments were conducted, the number of experiments made with 
each crop, the size and the number of the plots, and the number 
of analyses made of samples of the products. Details of these 
experiments may be found in the Reports of the Station for 
either the year in which the experiment was made or the year 
following. | 
