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Universities' 'living laboratories' providing answers
By Mark Leslie
While the golf industry's past is littered with anxious moments amid
unanswered questions about its environmental integrity, the present
is bulging with scientific data dispelling many of those fears. The
turnaround, to a great extent, has emerged from research conducted
the past few years at new university golf courses that are serving
as "living laboratories."
Kansas State University and
Clemson University have recently built golf courses with a mission
- to provide a body of scientific knowledge surrounding golf course
construction and maintenance - as well as serving as competitive venues.
At the same time, Purdue University rebuilt its Kampen Golf Course,
where scientists have an ongoing major wetlands study. Many of the
other major universities with turfgrass programs have undertaken myriad
scientific studies, especially since 1991 when the United States Golf
Association (USGA) ratcheted up its funding for such projects. Since
1981 that funding alone has totaled $21 million, according to Dr.
Michael Kenna, research director for the USGA.
"Work has been done all
over the country - from Penn State to the universities of Georgia
and Illinois, Texas A&M, Kansas State, Rutgers, Arizona and elsewhere.
Everybody has contributed," said Dr. Trey Rogers of Michigan
State University, whose two old-time golf courses are frequented by
scientists of all disciplines.
That research has paid enormous
dividends, Rogers said, adding, "We have gotten a lot further
down the road than in the late 1980s and early '90s."
While many environmentalists
and others in the general public painted golf courses as "the
big bad guy," he said, "what we have found out is that turfgrass,
by its general nature and natural attributes, is a tremendous filter
for fertilizers and chemicals. In regard to return on investment,
the value of the work done with USGA funding is probably immeasurable
at this point."
"The database," agreed
Dr. Bert McCarty of Clemson, "has shown that golf courses are
not the polluters once thought. If pesticides are applied just before
a 2-inch thunderstorm, that is a problem because the chemicals may
flush out into the ground water before the grass can take them in.
But if you avoid catastrophic rainfall, the data has shown overwhelmingly
that golf courses are very beneficial.
"You don't hear as much
hype about nutrient or pesticide leaching as you did 10 years ago
because data has come out disproving it."
At Kansas State University,
the 2-year-old Colbert Hills Golf Course has been a virtual wellspring
of information unique from any other course in the world because a
group of researchers spent two years prior to construction gathering
baseline data to compare with data collected once the course was built
and operating.
Indeed, because Colbert Hills
is an Audubon Silver Signature Course, Audubon International, along
with various Kansas State scientists, had substantive input into the
course design with golf course architect Jeff Brauer and design consultant
and PGA Senior Tour player Jim Colbert.
"Audubon International
staff consulted, mostly on water and runoff issues, and K-State scientists
were involved in setting the drainage patterns and selecting the turfgrasses
and research areas out on the course," Brauer said.
Testing Positive
The major findings at Kansas State and Purdue, so far, are positive:
o At Purdue, Dr. Zac Reicher said they have proven that creative wetlands
filter and improve water, whether it is entering or leaving the course.
"The biggest thing we have
found," he said, "is that the quality of water in terms
of nitrogen when it comes onto the course, is reduced throughout the
[three-quarter-mile] wetlands system. Then it is either released into
a natural wetland, or recycled and pumped back into irrigation ponds."
Referring to a creek that runs
through Kansas State's Colbert Hills, Dr. Steve Starrett of the Civil
Engineering Department said, "The erosion that occurred during
construction was significant, but it was a short-term impact and,
since then, it has reduced to below preconstruction levels."
"I'm not surprised at that
finding," said Brauer. "We discovered at Giants Ridge Golf
Club in Minnesota that the water quality in Wynne Lake improved once
the course was built."
Starrett is keeping track of
a dozen studies at Colbert Hills, ranging from water and soil quality
to turfgrass management, grassland ecosystems, geographic information,
and aquatic, avian and insect communities.
Indeed, Colbert Hills stands
as "a testimonial to the researchers in turfgrass," said
Dave Gourlay, CGCS, director of golf operations. "They helped
with everything and have made it a living laboratory, a real role
model of how golf courses can function. It's one of a kind."
In the world of research, five-
and 10-year studies are often the norm. (As Kansas State's Starrett
said, "I think we need at least five years of operational timeframe.")
And university researchers, as well as golf course superintendents,
around the country are waiting with great expectations for the results
of those long-term studies.
At Clemson, Dr. Ted Whitwell,
chairman of the Department of Horticulture, said of Walker Golf Course:
"There have been a lot of interdisciplinary studies on the course
- in entomology, wildlife biology, environmental toxicology, turfgrass
studies... There are numerous projects going on."
Whether it be SubAir tests or
soil-fertility studies at Clemson; insect migration at Kansas State;
or water-quality research at Purdue, superintendents are interested.
Superintendent Don Garrett,
CGCS, says the substantial SubAir tests on research plots and several
"weak" holes on Walker Golf Course show that the system
which pumps air below the surface of greens "works well. It is
questionable whether it creates a significant change on soil temperature.
But you can remove water from the soil and get oxygen into it; if
I can do that, that's is a good thing."
Garrett foresees help to superintendents
when a study on spring dead spot is complete; and added that research
on a sensitive creek on the property has proven the course has almost
no effect on water quality. Although this might be a site-specific
finding, a mass of such anecdotal information should help the golf
industry as a whole, he says.
Meanwhile, students for whom
one might not consider the golf course helpful, are gaining experience
there. An engineering class held a competition to design the best
footbridge across a lake on the course, surveying, conducting tests
and then designing three styles of construction. And landscape architecture
classes have held competitions for designing plans for holes on the
course.
Because Colbert Hills is unique
in that studies were performed on its 315 acres of prairie and pasture
before construction, it may provide the most useful data. In fact,
it already is doing so.
"All of our studies are
very unique because of the scale we are working on," said Starrett.
"We are studying these parameters on a functioning golf course
in a large 1,200-acre watershed."
"It's been tremendous just
talking to the entomologists," said Colbert Hills' Gourlay. "They
give us thresholds. Sometimes we think the thresholds are too large
and that we should take a different type of control action, but they
tell us to hold on for another week and the pests will be gone. And
they are correct. It helps us make more strategic controls on the
golf course. We are finding that oftentimes the best control is simply
to wait things out."
"Dave has one of the lowest
maintenance budgets I know, and he does a tremendous job," said
Brauer. "That course is in fantastic shape."
Perhaps the most significant
study is at Colbert Hills. Several agronomists, entymologists and
biologists have developed a mechanism for defining soil quality and
determining what characteristics of the soil should be improved.
"We had the unique opportunity
to get in on a golf course development from the very beginning,"
says Dr. Steve Thien, "so we started studying the site's many
parameters, looking at the physical, chemical and biochemical characteristics
of the soil... We were able to follow changes in these characteristics
from the time it was native grassland into construction and now in
its third year of course operation time."
Thien measured 22 different
parameters - ranging from organic matter content to pH, aggregation,
microbial biomass, salinity, porosity and the availability of several
nutrients. "We do not know exactly the ideal value for a lot
of these parameters," Thien says, "so we have tried to establish
a window between the upper and lower limits on each measurement. For
instance, for the bulk density of soil, we might set the window between
1.2 and 1.4 grams per cubic centimeter. We monitor this over time
to see if we're staying in that window or moving out of it. Depending
on which side of the window we're moving, that would prompt certain
management to bring it back in line."
What Thien and his colleagues
have developed, he says, is "exactly what a golf course manager
would need. It is based on science but you don't have to be a scientist
to understand it."
The "it" he refers
to is a spider radar graph which expresses all of these parameters.
"Imagine a spider's web with a lot of rays going out from the
center," Thien says. "Each ray is one of the parameters
we are studying. We have normalized all of the data so that we can
draw two rings - the lower acceptable limit and upper limit - for
each parameter."
By plotting a point on this
graph for each characteristic in a golf course's soil, a superintendent
could quickly look at the graph and determine the health of his his
environmental ecosystem and where any problems lie.
The U.S. Department of the Interior
is interested in this research for use on parks and recreation land,
Thien says, adding that Kansas State is hoping a firm comes forward
to create software based on and market this method of soil-quality
testing.
Micro Research
Now the Norm
Meanwhile, with the major questions
regarding chemical leaching and erosion having been answered, researchers
are eyeing studies of a more specific nature.
"Today," said Michigan
State's Rogers, "the USGA is sponsoring [more focused] research
that says, for instance, 'Let's look closer at dollar spot and determine
exactly what is causing it and can we stop it.' "
McCarty confirmed Rogers' statement,
pointing to studies on root biostimulants, Bermudagrass encroachment,
dry versus wet soils, and other such tests.
As scientists, research assistants
and students walk their college golf courses with microscope or test
vial in hand, university officials are taking calls from developers,
city planners, environmental groups and others looking for results
to help their cause - be it to support or stop particular golf course
projects.
"I commonly get calls from
around the country from politicians and community leaders, asking
my opinion of the golf industry and the environment because they have
a new golf course proposed in their areas," said Starrett. "There
are two different ends of the spectrum. Some feel adamantly there
is a huge negative environmental impact and others are very pro golf.
I get to tell them where reality is at."
That reality comes from a growing
wellspring of scientific data that has pointed accusing fingers away
from golf.
At this point in time, said
the USGA's Kenna, greenhouse and small field studies appear to find
golf courses innocent. Nevertheless the government has done water-quality
research that shows spikes in the amount of nitrogen, phosphorus and
pesticides in both urban and suburban runoff.
"I don't know how many
more sites we can evaluate," he added. "At some point it
is not the USGA's problem. Some of the companies, and the government
as well, need to address these issues, particularly problems stemming
from homeowners."
Kenna, however, did add one
caveat: "Everyone thinks this issue [of golf's environmental
impact] is going away. Superintendents are certainly more careful
than 10 years ago. But golfers are making some difficult demands on
superintendents that sometimes can cause them to possibly do some
things that are a little more risky than they would like to do."
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