FLORIDA STATE HORTICULTURAL SOCIETY 
29 
into seven compartments of approximate¬ 
ly a square yard each. The soil in this 
bench was five inches deep. It was pos¬ 
sible here to control conditions bettetr 
than in the field and especially to eliminate 
the migration of nematodes into the treat¬ 
ed soil. 
Section 1 was treated with cyanamid 
at the rate of 4 tons per acre. It was 
mixed with the dry soil and then wet 
down. At this date, March 29, 1915, the 
importance of a thorough mixing of the 
material with the soil was not properly 
appreciated and the mixing was not as 
thorough as it should have been. 
Section 2 was treated at the rate of 2j4 
tons per acre. This was dissolved in water 
but the wet soil was thoroughly stirred. 
Section 3 was treated with the same 
dosage and also in water but the soil was 
not stirred. The water was depended 
upon to distribute the cyanamid through¬ 
out the bed. 
Section 4 was not treated with cyana¬ 
mid but left as a check. It was thorough¬ 
ly wet down. 
Section 5 was treated with cyanamid at 
the rate of 2 tons per acre, applied as in 
section 2. 
Section 6 was treated at the rate of 
1440 pounds per acre, stirred in dry and 
then wet down. 
Section 7 received the same dose but 
it was added in solution. 
On April 8 these plots were planted 
with tomatoes, cabbages, peppers, and 
lettuce. On the three plots that had re¬ 
ceived the heaviest doses, very few seed¬ 
lings appeared. On the three receiving 
the weaker doses they appeared but quick¬ 
ly died. Section 6 was almost sterile on 
May 21, there being very few weed seed 
even. On the check, Section 4, there 
was a vigorous germination of both 
weeds and tomato seeds, the latter were 
heavily infested with nematodes and 
quickly died. 
Owing to unsatisfactory temperature 
conditions, the bench was abandoned dur¬ 
ing the summer, not even being watered 
except by rain water which leaked through 
the roof. 
On September 11, the bench was again 
planted to lettuce, celery, carrots, cucum¬ 
bers and tomatoes. To our surprise some 
of these plants also died on sections 1, 
2 and 3. Evidently the fact that the plots 
were dry during the summer prevented 
the decomposition of the cyanamid. A 
few cabbages in one plot only, Section 1, 
lived. Replanting in this section showed 
scorching of tomatoes as late as January, 
1916. These recovered, however, and 
made good growth. Up to the present 
time all plants grown in this section have 
been free of nematodes except those 
grown in the small portion where the 
September planting of cabbages was not 
killed. Apparently in the insufficient mix¬ 
ing, this portion failed to receive its share 
of cyanamid. 
Section 2 has remained entirely free of 
nematodes. Evidently a dose of 2/4 tons 
per acre on shallow soil will kill all nema¬ 
todes. Of the seeds planted in Novem¬ 
ber, celery was not scorched at all; cab¬ 
bage showed some scorching; lettuce con¬ 
siderable; cucumbers and tomatoes quite 
badly. 
On Section 3 the effects were about the 
same as far as scorching was concerned, 
but there were a few nematodes on these 
