The plot area was treated with 10% heptachlor granules broadcast at 60 pounds per acre for
cutworm control on March 9. Sidedressings of fertilizer were applied on April 13 and 19,
each at 500 pounds per acre. Both middles were plowed at the second sidedressing to
incorporate the broadcast application of Bayer 25141. Applied 500 pounds of shade fertilizer
7-5-7 on May 3 due to excessive rainfall in April. The Dixie Shade (DL-4) variety was
transplanted in all plots on April 6. Most treatments were applied 60 to 61 days before
transplanting with the exception of the second application of Bayer 25141, which was applied
13 days after transplanting. The treated area of each plot was 16 x 36 feet. Each plot was
decreased in size to 16 x 32 feet on April 21, when vacancies in each row were reset with
plants from the treated ends of each plot row. No reset was transposed from one row to
another row.

 Weed Growth.--Visual weed growth ratings were made on March 5, April 2, May 5, and 26.
The readings were based upon a visual growth appearance rated according to over-all density
of growth per plot. The rating system was as follows:

 0 No weed growth
 1 Light weed growth
 2 L Moderate weed growth
 3 Heavy weed growth
 4 Very heavy weed growth

The average of these readings, reported as the weed index, are given for March 5, April 2, -
and May 26.

 Plant Growth.--Measurements of plant growth were made on May 12, 19, 26, and June 2,
after the plants began showing wilting and stunting symptoms. Plant growth as an indication
of response to the various treatments was reported as a measurement in inches per plant
from the base of the stalk at ground level to the base of the terminal bud. Height
measurements were discontinued as soon as the plants began to button. Plant growth responses
are somewhat accelerated after formation of the reproductive portion, and this tends to
confuse height measurements.

 Nematode Populations.--Root and soil samples were taken from the 5th, 15th, and 25th
plants from the east buffer row of each plot on July 19. The three root and soil samples
were combined into one composite sample for each plot. The samples were processed and the
results were reported as average numbers of nematodes per 1 gram of root or 100 cubic
centimeters of soil.

 Poot Disease Readings.--Root disease readings were taken from every 3rd plant in the
experimental plot rows on July 8, constituting 10 plants per row or a total of 20 plants per
plot. Diseases rated in these observations were black shank, root knot, and coarse root
(nematode root rot). The severity of each disease was rated in eleven categories ranging
from 0 to 100. The average of the readings per plot was reported as the disease index.

 Crop Evaluation.--The crop was harvested (primed), cured, fermented, and graded
according to the usual commercial practices. Seven leaf primings were made during the crop
season on May 27 (3 leaves), June 3 (3 leaves), June 9 (3 leaves), June 17 (3 leaves),
June 22 (3 leaves), June 25 (3 leaves), and June 30 (3 to 5 leaves). The leaves taken at
each priming represent the number primed per stalk. Leaves harvested for the crop data were
taken from the experimental plot rows of each plot. Yield was calculated in pounds per acre
from the total weight of fermented leaves from each treatment replication, and reported as
the mean of four replications. A sample (one hand totaling 32 to 38 leaves; approximately
li:3 grams) of leaves from each priming of each replication was graded to obtain the grade
index. The best grade was assigned a factor of 1.000, and the other grades were assigned