Report on the Agricultural Experiment Stations, 1952 Page: 37
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VEGETABLE CROP RESEARCH 37
fertilizers have been added to fungicide sprays to control premature
defoliation. Increases up to 2.35 tons per acre have been realized
where borax or borax plus magnesium sulfate have been added to the
At the Idaho station attention has been given to the problem of the
winterkilling of fall-planted turnips intended for seed production
the following summer. It was found that plants obtained from turnip
seed planted in the bottom of listed furrows at any time between
August 20 and August 31 would survive even under conditions of
severe freezing and thawing. Planting in the listed furrows provided
protection from the winter sun's rays, dessication by wind, and
from intense cold under a poor snow cover, as well as a support for
the tops of the turnips which, in turn, provided an insulating effect
against low soil temperatures at the base of the plant.
At the Ohio station mushroom yields were increased up to 50 percent
when vitamins were added to mushroom beds. Additions of
riboflavin, niacin, thiamine, and pantothenic acid each resulted in
increased yields, but the greatest yield came from a combination of
all four vitamins. Chemical assay of the mushroom crop grown in
the treated beds did not show any significant increases of vitamins,
but the increase in yield alone permits a profitable production of 2
pounds of mushrooms per square foot of bed.
In connection with its efforts to obtain greater efficiency of operation
the vegetable industry is becoming increasingly aware of the
need for better land utilization. To that end more effort is being given
to obtaining maximum yields from minimum acreage. Within the
past year several States have reported on the effect of closer spacing
The Georgia station has completed a study to determine an improved
method of spacing asparagus. Rows were spaced 5 feet apart,
with spacing between plants of 12, 18, 24, 30, and 36 inches. It was
found, in a 7-year test, that the yield and number of spears per acre
decreased as the distance between plants increased. The highest yield
was obtained from the 12-inch spacing.
In research at the Utah station, yields of Clarks bush lima beans
were significantly increased when the width between rows was reduced
from 24 inches to 12 inches. No significant difference was observed
when the rows were 12, 16, or 20 inches. With the dwarf variety
Utah 16, however, the 12-inch spacing of rows resulted in a profitable
increase. Incidentally, Utah 16 surpassed in yielding ability the
commercial varieties with which it was tested.
Broccoli has been the subject of a spacing experiment at the California
station. Work with five varieties has shown that the highest
yield of sprouting broccoli results from a spacing of slightly more
than 8 inches, whereas in a 12-inch spacing total yields were reduced
significantly even though head and stem diameters were greater than
at the 8-inch spacing.
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United States. Office of Experiment Stations. Report on the Agricultural Experiment Stations, 1952, book, January 1953; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5990/m1/39/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.