LyYsIMETER EXPERIMENTS — II 67 
TABLE 19. Canctum In DraINnaAGE WATER AND IN Crops 
(In pounds per acre, annual average) 
Burnt Calcium | Calcium 
Tank lime in in Total 
(pounds) | drainage crops calcium 
water 
Bie g 6, 6:0.0-0 a:b .e) 00 Ota Se era aa mr ne None 257 .6 7.46 265.1 
AN ERO ati aces Speci scoiso vane ¢ c's spsiets Wiis None Be Shs coe ae 319.4 
(Be gc052000.04 3 ae Conn ter enna irae ane 3,000 255.1 10.09 265.2 
1G .5'S 6:0 ¢ 8 ol 0:0 00 CRO Rte aa 3,000 OSS AW Sandie coy. 383 .4 
fy 
The figures for average annual calcium removal for the entire five-years 
period, as given in table 19, show a very large increase in the quantity 
of calcium leached out of the bare limed soil as compared with that from 
the bare soil unlimed; they show also a moderate increase in the calcium 
contained in the crops, but they do not indicate any effect from the liming 
on the calcium leached from the cropped soil. The evidence, however, is 
in favor of the conclusion that liming increases the amount of soluble 
calcium in Volusia soil, while it has no such effect-on Dunkirk soil. This is 
hardly to be accounted for by the absorbent properties of the soil for lime, 
since Volusia soil has a somewhat higher lime requirement than Dunkirk 
as determined by the Veitch method. 
The concentration of calcium was appreciably greater in the drainage 
from the limed soil than in that from the unlimed soil, both when planted 
and when kept free of vegetation, as may be seen in table 18. 
Liming to maintain the calcium content 
The Volusia soil, altho low in calcium, is annually losing a large quantity 
in the drainage water, particularly from the unplanted soil. The removal 
of calcium in the ash of crops has been small as compared with that in 
the drainage water. If the loss of calcium from the limed soil were to 
be replaced, it would require an annual application of 536 pounds of 
pure burnt lime, or 957 pounds of pure limestone, to supply the uncropped 
soil, and 371 pounds of burnt lime, or 662 pounds of limestone, to supply 
the planted soil with calcium to the amount removed in the crops and in 
the drainage water. 
