NEWARK, Del. Lima beans
have been an iiriportant crop for
Delaware farmers since the turn of
the century. The smaller seeded
baby lima, as opposed to the larger
seeded Fordhook, has been the
main type grown. Delaware still
produces more baby limas than
any other state except California.
Acreage m recent years has
leveled off at the 10,000 acre mark,
but got as high as 24,500 in 1949.
Yields per acre have fluctuated,
too, but don’t seem to have im
proved over the years, like peas.
Compared to lima beans, the
historic yield per acre of Delaware
grown peas shows a general trend
upward from 1,000 pounds of
Computer program slated
FLEMINGTON, N.J. - A one
morning program on farm and
home computers is being planned
by Hunterdon County, N.J. Ex
tension on Friday. This will be an
opportunity to see how computers
apply to present day farm
operations.
' Topics include “Do I Need a
Farm Computer?”; “Crop
Management by Computer; ” and a
discussion panel and actual
demonstrations to round out the
program.
Bunk Feeding
ACTION WITH TRADITION odd
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Feed-Way 155
TOTAL
See just how easy bunk feeding can be...
COME IN TODAY FOR A DEMONSTRATION
AREA REPRESENTATIVE
DAVID D. DIETRICH PHONE
Rte 5, Box 758 (703) 667-3787
Winchester, VA 22601 (703) 667-0363
Hi stands Farm
Centers
717-744-2371
SHIPPENSBURG, PA
Witmer Impl
717 532-6139
HAMBURG, PA FREDERICK, MD RISING SUN, MD LEBANON, PA
Shartlesville Farm Knott and Geisbert Ben Haines Evergreen Tractor Co
Service
215-488-1025
shelled peas per acre in Delaware
in the IGlO's t>< between 2,(500 and
3,000 pounds in the eighties. This is
primarily the result of better
varieties and improved irrigation
practices, says University of
Delaware extension vegetable
specialist Ed Kee.
Lime bean yields, on the other
hand, have hovered between 1,500
and 2,000 pounds an acre over the
same 30-year period, except for
some occasional dips down to 1,000
pounds.
What’s the problem with limas?
“Why aren’t we seeing the kind of
improvement peas have shown?,”
Kee asks. “Some very good
varieties have been introduced.
Speakers will be David Lee,
Salem County Agent, and Ray
Samulis, Burlington County Agent.
Both have had extensive ex
perience in working with crop
growers in computerizing their
operations. Lee is a dairy and field
crop agent and Samulis works
principally with vegetable and
fruit growers.
Supporting the program is the
First National State Bank of West
Jersey. David Buchholz of its staff
will be on the panel and will also
MIXED
RATIONS
GREENWOOD, DE
Delndge Supply, Inc
302-349-4327
301-662-3800 301-658-5359
Stress affects lima yields
YORK, PA
Neuhaus'es
717-428-1953
WAYNESBORO, PA
B Equipment, Inc
717-762-3193
Inc
717-272-4641
Most have resistance to several
strains of downey mildew disease,
making it possible to reduce or
even eliminate spraying some
years.”
Advances in irrigation
technology have been applied to
lima bean acreage, just as they
have to peas. Why haven’t these
improvements boosted yield
averages?
“The fact is,” says Kee, “lima
beans are simply more sensitive to
the extreme summer growing
conditions on Delmarva. Flowers
and newly set pods, called ‘pins,’
will drop off under moisture or
temperature stress. And we get a
lot of both.”
provide a computer and a few
programs for demonstration.
Frank Wright, Rutgers’ Dairy
Specialist, and Bill Bachenberg,
farmer and computer systems
consultant, will also participate in
the panel discussions and
demonstrations.
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For years, area scientists have
studied the effects of these
stresses, measuring the
relationships between rainfall,
temperature, humidity and yield.
They have found that vegetative
growth of the lima bean plant is
adversely affected during any
period with temperatures above 94
degrees, or when temperatures
above 90 degrees are combined
with high humidity
Pollination, on the other hand,
suffers whenever temperatures
reach 90 degrees under low
relative humidity. Lack of rainfall
or irrigation for seven days
negatively affects both general
plant growth and pollination.
When researchers at the
University of Delaware
Agricultural Experiment Station
plotted actual weather conditions
over past growing seasons, and
compared these with lima bean
yields, they found a definite
correlation between the frequency
of stress periods and average
we’ve got: it
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statewide yield.
In 1966, for example, the average
Delaware yield was 1,000 pounds
an acre. “That year, there was an
extended drought,” Kee says,
“with no 7-day period between
June 30 to September 19 receiving
more than one inch of rain. As you
would Expect, there were also
periods of high temperature
throughout the season.”
The following year both rainfall
and temperatures were more
moderate and in response,
Delaware’s average lima bean
yield rose to 1,740 pounds per acre.
“Understanding the climatic
factors which affect lima bean
yield has clear implications for
irrigation management,” Kee
says. “Not only is soil moisture
important, but higher humidity
levels will also encourage pod set.
We also use this information about
the lima bean plant’s response to
stress when we test new lima
varieties for ther adaptability to
this region.”
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