as 
LysIMETER EXPERIMENTS —II 57 
Comparing the figures for percolation thru the Volusia soil with those 
thru the Dunkirk, given in the earlier publication already referred to, it 
will be seen that the former soil is more permeable than the latter and that 
the crops on the former used about an inch more rainfall. 
In table 4 of the appendix (pages 81 to 83) are given the weather records 
at Ithaca by months, including the rainfall, the mean maximum, mean 
minimum, and mean temperatures, the hours of sunshine, the average 
hourly velocity of the wind, and the mean humidity of the air, for the 
period from May 1, 1913, to April 30, 1918.2. These data were obtained 
at a distance of somewhat less than a mile from the lysimeters. 
Effect of liming on percolation 
As already stated, tanks 15 and 16 received an application of burnt 
lime at the rate of 3000 pounds to the acre. It has frequently been said 
that liming, especially with burnt lime, has a tendency to make a heavy 
soil more permeable to water. If such has been the effect of the lime 
on this soil, it may possibly be shown by comparing the volume of drain- 
age water from the limed and the unlimed tanks. There may be some 
question, however, whether any flocculating action which the lime may 
have had on the upper six or seven inches of soil with which it was incor- 
porated would increase the amount of percolation thru the entire four 
feet of soil. Comparisons would best be made between limed and unlimed 
tanks that have otherwise received similar treatment, and this is done 
in table 7. It is evident from this table that the application of lime has 
TABLE 7. Avrerace ANNUAL PERCOLATION OF RAINFALL THRU LIMED AND UNLIMED SOIL 
DURING FIVE-YEARS PERIOD 
Soil not limed Soil limed 
Crop treatment Fertilization 
Flow Flow 
Tank (acre Tank (acre 
inches) inches) 
No plants allowed to grow...... Farm manure. 14 | 28 .60 16 25.66 
Oats, peas, corn, oats, barley. ..| Farm manure. 13 21.28 15 19.96 
PR CER DOOD eo 2 Es one ay 24.94 22.81 
2 The authors are indebted to Dr. W. M. Wilson for the weather records at Ithaca. 
