WASHINGTON, D.C.
Com growers want to protect
and improve water quality. But
government nonpoint source
pollution programs should
allow for management mea
sures that are technically and
economically viable on the
farm, said Pete Wenstrand, an
Essex, lowa, com grower and
vice president of the National
Com Growers Association
(NCGA).
Wenstrand spoke here
before a subcommittee of the
House Committee on Public
Works and Transportation as it
met to consider rewriting the
current Clean Water Act. Wen
strand testified on behalf of
NCGA, the National Cotton
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Corn Growers Seek More Funding
Council, the National Associa
tion of Wheat Growers, the
American Soybean Associa
tion, the National Barley
Growers Association, and the
U.S. Rice Producers Group.
“Farmers favor adequate
protection for our nation’s
water quality,” Wenstrand
said. “We can improve water
quality without burdensome
regulation or taxation of inputs
through reasonably funded
programs that encourage far
mers to carry on a legacy of
stewardship while maintaining
their economic ability to pro
duce food and fiber for a world
market.”
Wenstrand encouraged the
committee not to cast aside
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Section 319 of the Clean Water
Act, which gives states authori
ty to set up federally-funded
nonpoint source pollution
programs, in favor of a cum
bersome regulatory approach.
The lowa com grower than
suggested ways Congress
could strengthen water quality
initiatives. “First among our
core principles is that the feder
al government should allocate
additional resources to states to
assist them in better identifying
water quality problems and
activating effective manage
ment strategies,” he said.
“Second,” Wenstrand said,
“greater financial commitment
should be directed to research,
monitoring and assessment
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Corn Talk, Lancaster Farming, Saturday, October 9,l993—Page
programs and enable effective
and cost-efficient responses to
water quality problems.
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lems are identified, landowners
should be encouraged to adopt
voluntary, site-specific water
(Turn to Pago 16)
EFFECT OF
STARTER FERTILIZER
ON CORN GROWTH
AND DEVELOPMENT
Greg Roth
In high fertility soils, it is common to
see a visual response to starter fertilizer in
the spring that is not accompanied by a
yield response.
A recent University of Illinois study
examined the growth patterns of com
planted with and without a starter fertiliz
er to try to explain why enhanced early
season growth does not result in a yield
response. The results of the study, con
ducted by Donald Bullock and his col
leagues, was published recently in Crop
Science.
In this study, com was planted in a high
phosphorous (P) testing soil in both 1990
and 1991. One half of the plots received
11.5 gallons/acre of an ammonium poly
phosphate that supplied 13-47-0/acre.
The other plots received no starter fertil
izer. The hybrid used in this study was
Pioneer brand 3379. The authors sampled
the com plants in each treatment 18-20
times each year to monitor growth and
development.
Com in the starter fertilized plots
showed a 16-20 percent increase in plant
dry weight early in the season compared
to the com where no starter was used.
Plant dry weight at harvest and grain yield
were not affected by the starter fertilizer
in either year, however. Leaf area mea
surements showed that the starter fertiliz
er plots had higher leaf area until silking.
Shortly after silking, however, the leaf
area of the non-starter plots surpassed the
starter plots. It was also noted that the
starter fertilizer treated plants reached
silking and black layer about 2 to 3 days
before the untreated plants and were
about 1 percent lower in moisture at
harvest
The authors conclude that starter
fertilizer-treated plants developed faster
early in the season but that this did not
result in larger leaf area during the grain
fill period. The starter fertilizer apparent
ly hastened the plants’ development and
maturity enough to offset the advantage
from the faster early season growth.
These results appear to be consistent
with observations from studies in Pen
nsylvania. On high P testing soils, we fre
quently see a visual response to starter
and sometimes a reduction in grain mois
ture. but often no yield benefit On low to
optimum P soils, however, starter shows a
fairly consistent yield response, particu
larly on early planted com. Hie maturity
effect of starter fertilizer is also.important
in our short season areas where crop
maturity can be a problem.
215