196 STORRS AGRICULTURAL EXPERIMENT - STATION. 
Explanation of tables 36 and 37. — Table 36 gives the com- 
position of samples of cow pea fodder grown in the special 
nitrogen experiments. These experiments include two plots 
with no fertilizer, two plots with mineral fertilizer only (phos- 
phoric acid and potash), three plots with nitrate of soda and 
mineral fertilizer, and three plots with sulphate of ammonia 
and minerals. A few analyses of samples from a single soil 
test experiment were added, two from nothing plots, one from 
a mineral plot (F), and one from a plot (G) with the first nitro- 
gen ration (25 pounds per acre). The cow peas were grown 
for green feed, or for silage, and the crop was harvested before 
many pods had formed—if any were present they were 
sampled with the fodder. The kinds and amounts of fertiliz- 
ing materials and the quantities of nitrogen used on different 
plots are shown in the second column, and the kind of experi- 
ment in the third; the balance of the table shows the per- 
centages of the various food constituents on the basis of water- 
free substance. The average composition of the crops from 
the different plots is shown in bold-faced type, which figures 
are used in the summary Table 20 on page 150 of the text of 
this article. 
Table 37 gives the yield per acre of the water-free sub- 
stance and of the various food constituents from different plots. 
The ‘yields of water-free substance were calculated from the 
weight of the crop, and the percentages of water-free sub- 
stance in the crop at the time of harvesting. The yields of 
protein, fat, etc., were obtained by multiplying the weights of 
water-free substance per acre in Table 37 by the percentages of 
protein, fat, etc., for the same plots in Table 36. The average 
vields given in bold face type in Table 37 are used in the sum- 
mary Table 22, on page 153 of the text. 



