62 T. LytTrLeTon Lyon AND JAMES A. BiIzzELL 
an important factor in crop production; on the other hand, it may be 
significant, especially if it is supported by evidence drawn from the removal 
of nitrogen in the drainage water. 
Effect of liming on removal of nitrogen in drainage water 
The quantities of nitrate nitrogen removed in the drainage water of 
unplanted soil afford a better means of ascertaining whether liming in- 
creases nitrate formation than does the removal of nitrogen in crops. 
The data by years for the nitrogen in drainage water from unplanted soil 
are presented in table 13: 
TABLE 13. Nirrocen In DRAINAGE WATER OF UNPLANTED TANKS, CALCULATED TO 
Pounps PER AcRE BY YEARLY PrERtops (May 1 To Apri 30) 
Nitrogen in drainage water 
Burnt ~ (pounds per acre) 
Tank Fertilizer lime 
(pounds) |__| 
1913 1914 1915 1916 1917 Total 
WAN Ne rete Manure..| None | 73.41 | 34.21 | 49.31 | 34.47] 38.71} 230.11 
NG Seer tere Manure..| 3,000 | 88.45 | 49.56] 55.79 | 50.80] 46.19 | 290.79 
In each year the removal of nitrogen in the drainage water from the 
limed soil was greater than from the unlimed, which is very good evidence 
that the lime produced a condition more favorable to the production of 
nitrates. It may be remarked that the application of lime to the Dunkirk 
soil was not attended by any increase in the removal of nitrogen by the | 
drainage water or by the crops. This difference in effect of lime is all 
the more striking inasmuch as the lime requirement of the surface foot | 
of the Dunkirk soil is very little less than that of the Volusia. The per- | 
centage of calcium, however, is about one-third less in the surface foot of | 
the Volusia. In this case the relative calcium content of the soil is a better | 
guide to its need of lime for nitrification than is the lime requirement as | 
determined by the Veitch method. t | 
Effect of liming on removal of nitrogen in both drainage water and crops 
While the nitrogen in the crops alone may not be an adequate a | 
to the effect of lime on the soil, the nitrogen in the crops added to that in 
the drainage water from the same tanks is perhaps somewhat more com- 
