30 
FLORIDA STATE HORTICULTURAL SOCIETY 
plants. This Coincides with other expe¬ 
riments which indicate that one does not 
get as good results when the cyanamid is 
added in water. The top layer of the 
soil seems to absorb the material. 
Section 5 showed one corner next to 
the check to be heavily infested, the re¬ 
mainder free. This distribution led to 
the suspicion that the partition between 
may have worked loose; a suspicion which 
was verified upon examination. We be¬ 
lieve the nematodes were exterminated in 
this section by a dosage of 2 tons per 
acre. 
Section 6; by May, 1916, there began 
to be a few knots noticeable on tomatoes. 
Up to this time there had been none no¬ 
ticed. Probably 1440 pounds per acre is a 
little too small a dose to do thorough work 
of eradication, although it greatly reduced 
the nnmbers of the nematodes. 
Section 7 with the same dosage as 6, 
but added in solution had some root knot, 
but markedly less than the check. 
In section 4, check, all plants were so 
heavily infested with nematodes that they 
made very little growth. 
In November, 1915, another series of 
thirteen plots, each containing a hun¬ 
dredth of an acre, was treated with cyana¬ 
mid. The dosage ranged from 420 to 
3600 pounds per acre. On two of these 
plots the material was added in solution 
and two were left untreated, for checks. 
On the other nine plots about half of 
each dosage was broadcasted over the sur¬ 
face of the ground which was then deeply 
plowed. The remainder of the dosages 
was then applied as a top dressing to the 
plowed land and thoroughly disked in. 
The soil was rather dry at the time of 
application and it was not irrigated. 
Few nematodes were found on the plots 
that had received 1500 pounds or more 
per acre. But by June, 1916, a few 
plants on each of the plots, even on the 
one that had reached 3600 pounds per 
acre, showed knots. 
Other plots were started on July 1, 
1916, using dosages varying from L* to 
3 tons per acre. This was applied as in 
the previous case. No rain fell for a week 
after application. Later examination 
showed that on none of the plots were 
the nematodes entirely exterminated al¬ 
though there were very few on the plot 
that had received 3 tons per acre and those 
on two spots only. Perhaps those spots 
had not received their proper proportion 
of the material. On this plot all plants 
planted three weeks after treatment ulti¬ 
mately showed serious scorching although 
heavy rain had fallen meanwhile. Cow- 
peas, corn, okra, and beans were planted. 
English peas planted on October 21, near¬ 
ly four months after treatment, showed 
some scorching on plots that had received 
2 tons or more per acre. 
These experiments indicate that the ap¬ 
plication of the material to dry soil is 
not very satisfactory. The nematodes are 
not entirely satisfactory. The nematodes 
are not entirely eradicated with dosages 
as heavy as three tons per acre, and the 
scorching effect on the plant is serious 
and long continued. 
EXPERIMENTS ON SEED BEDS AT SANFORD 
Some co-operative experiments were 
started with Mr. C. M. Berry, Agricul¬ 
tural Demonstration Agent for Seminole 
