RESULTS OF SUB-IRRIGATION. Ti 
irrigated beds. ‘‘ The lettuce rot, which appeared to a 
marked extent in the surface-watered beds,’’ he writes, 
“was apparently absent in the sub-irrigated beds. The 
disease was first noticed at time of marketing, at which time 
it could not be detected in the other beds. During the 
growth of the second crop it became very troublesome, and 
some of the varieties in the surface-watered beds required 
marketing before they were fully grown, while in the under- 
surface-watered beds the disease was completely held in 
check,’ 
Rane also found ‘‘ marked superiority’ in sub-irrigation 
for tomatoes, “no marked difference’’ in turnip-rooted 
radishes, ‘‘ very beneficial’’ effects in long-rooted radishes, 
‘‘a slight difference’’ in earliness in spinach, “no marked 
difference’’ in turnip-rooted beets, and ‘‘very marked’”’ 
gain in maturity of parsley from seed but ‘‘no perceptible 
difference in its growth” after the plants in the surface- 
irrigated soil ‘‘once reached maturity.”’ 
) 
Conclusions.— Green makes the following points of ad- 
vantage of sub-irrigation in glass houses : 
‘‘Watering by sub-irrigation in the greenhouse is more 
cheaply done than by the ordinary method. 
“Watering by sub-irrigation in the greenhouse is more 
efficiently done than by the ordinary method. 
“‘Where sub-irrigation is practiced in the greenhouse, 
the soil does not become compacted as by surface water- 
ings, but retains its original loose, friable condition, even 
without frequent stirring, nor does it become mossy, water- 
logged and sour. 
‘‘Plants are less liable to suffer from over watering 
and diseases by sub-irrigation than where the water is 
applied to the surface. 
‘All classes of plants which may be grown upon 
greenhouse benches thrive better by sub-irrigation than 
by the ordinary method of watering.”’ 
Rane writes as follows: ‘‘The saving of labor through 
sub-irrigation is almost inestimable. The expenditure of 
