ISU Turf Research Reports
Wednesday, April 13, 2011
Celebrate National Golf Day
Did you know that today was national golf day? Golf is a major industry in the United States that generates jobs, commerce, economic development, and tax revenues for communities throughout the country. A 2005 study showed that golf is a $76 billion dollar industry which generated $195 billion dollars in total economic input towards the national economy.
Locally, the state of Iowa has the third highest number of holes per capita which generate approximately 770 million dollars in total economic input and contribute over 10,000 jobs to the state. Despite this impact, the majority of the public know little about the economic impact of the sport and the turfgrass industry.
A number of individuals are on Capital Hill today to speak to lawmakers about the U.S. golf industry's economic, environmental, and social contributions. We have an Iowa tie in Washington as Jay Goughnour, Superintendent/Owner Racoon Valley Golf Course, is there to tell his story.
In November 2007, Goughnour bought Raccoon Valley Golf Course in his hometown of Jefferson, Iowa. He would continue to serve as the golf course superintendent, while his wife, Nikki, tended to the pro shop and office. But just months after purchasing the golf facility, Mother Nature unleashed her fury as water overflowed the banks of the adjacent Raccoon Creek. The Goughners would close their course for more than a month, losing $40,000 in revenue during the height of the golf season (accounting for just under 25 percent of annual revenues). Furthermore, the couple took out a loan for $60,000 to repair the damage.
Working diligently – while taking second jobs to cover the bills – the Goughnours slowly returned the course back to where it was with the intent on improving it. “It is the American dream to be a business owner,” Jay Goughnour says. "Then, through no fault of your own, it gets wiped away by a freak of nature. We are working hard to restore what we had and improve upon it. It would have been nice to be on the same footing as other small businesses to be eligible for government aid."
Each of us has our own story to tell about how golf and the turf industry has impacted our lives. Take the opportunity to speak to representatives in your communities about the benefits of the turfgrass industry. Below is a message from Davis Love III about National Golf Day.
Marcus Jones
Graduate Research Assistant
Monday, April 4, 2011
DIY Landscaping Approaches
Landscaping is one of the most common do-it-yourself projects out there. Almost everyone has planted a tree, shrub or flowering plant, and the DIY shows on television make the whole process look simple and doable in a weekend. Although landscape design and installation doesn’t require the same precision as brain surgery, there are still some really important underlying principles that need to be considered for the landscape to be successful. It would take far more space than this blog allows to cover them in detail, so I have simplified it to 5 key points and provided a few references at the end for more information.
1. Planning
Just as with most successful projects, good landscape design requires planning. The planning involves first analyzing the site where the new (or renovated) landscape will be installed. Included in this analysis is determining the environmental factors that will impact plant growth such as light conditions, soil type and drainage patterns. You should also note if there are existing features on the site like plants, buildings, or walkways that will need to be designed around.
2. Determining Function
Once you’ve decided what you have to work with on the site (soil, light conditions, etc.) the next step it to decide the function of the new landscape. Is it simply for aesthetics, maybe to highlight the entrance to a facility or building? Does it need to screen something or direct traffic around an area? Will it serve as a windbreak to protect an area? These are just a few examples, but there certainly are many more. In many cases the function of a landscape directly determines plant selection for the project.
3. Design Consideration
After the environmental factors have been considered and the landscape’s function determined, the design process can begin. During this phase the basic elements of design such as shape, texture, and color should be considered, in addition to the specific principles of landscape design. Understanding and implementing the complete array of landscape design principles is particularly important when large-scale designs (like a site master plan or residential backyard) are being created. On the other hand, for smaller individual projects which are more likely the type to be done on a golf course or municipal park, focusing on the shape of the planting area and the plants, as well as the texture and color of the plants and hardscapes will likely be sufficient.
4. Hardscape Selection
Hardscapes are any non-plant part of the landscape and include such things as concrete pavers, natural stone, poured concrete and wood. There is a whole range of hardscape materials that can be used in our climate and often the selection of a particular product is based on its aesthetic qualities (color and texture), price and availability, and ease of installation. Another consideration I suggest is the product’s sustainability. Is it made from recycled materials? Or, is it a permeable material that allows rainfall to pass through it and reenter the groundwater supply? There are a number of great resources available that describe pros and cons of different hardscape materials and they can be used to direct decisions about hardscapes.
5. Plant Selection
Matching a plant to the growing environment of the landscape site is the most important step in plant selection. Once this is addressed, then you can narrow your selection based on aesthetic features of a plant such as form, texture and color. One way to maximize the visual appeal of a landscape is to mass plants together in groups. The mature size of the plant impacts how many plants should be in the mass. Larger plants such as shrubs can have fewer plants, while a group of smaller perennials really need to have more plants (5-7 or so) in order to provide enough visual appeal. Combining plants with different sized leaves creates a nice contrast of textures and this adds visual interest. And certainly choosing plants with a long blooming period can provide lots of color in the landscape. Instead of relying just on flowers for color, be sure to include plants with unique and colorful leaves since the leaves will be persistent in the landscape all season long and provide color even when plants aren’t flowering.
Below are some examples of landscape plantings
Here are a few resources for more information:
Iowa State University Extension publications available at: https://www.extension.iastate.edu/store/Default.aspx
Landscape Plants for the Midwest (PM 0212)
Perennials for Sun (PM 1914)
Perennials for Shade (PM 1913)
Ortho’s All About Landscaping, by Kellum and McKinley
Ann Marie ZanDerZanden
Professor & Associate Director for ISU Center for Excellence in Learning and Teaching
Iowa State University
Monday, March 28, 2011
Name That Patch – Early Spring Brown Spots
Parts of the Midwest are getting hit with another round of snow but there is no denying that spring continues to inch closer by the day. In fact, before this last blast of winter weather, spring activities were slowly getting underway. Trees were beginning to break dormancy, bulbs were peaking through the soil, and lawns were starting to green up.
This process has already started across parts of the Midwest and some of you may have noticed patches, or areas of brown in your lawn. It’s typical to receive a number of questions from your clients about the cause of these brown spots during spring green-up. There are a number of reasons why these patches can appear and this article will address some of the most common reasons and discuss what action, if any, is needed to remedy the situation.
Dormant warm-season grasses
Most lawns in the upper Midwest contain cool-season grasses like Kentucky bluegrass, perennial ryegrass, and tall and fine fescues. Occasionally lawns, or parts of the lawn, will contain warm-season grass species. Examples of these could include zoysiagrass, buffalograss, or nimblewill. Whereas cool-season grasses grow best in the spring and fall, warm-season grasses prefer the mid-summer months and will remain dormant (brown) longer into the spring until warmer temperatures arrive.
If zoysiagrass or buffalograss are the cause of your brown spot there isn’t much you can do other than exercise patience until warmer weather arrives. Nimblewill can be selectively controlled with Tenacity herbicide. Tenacity herbicide will be made available to homeowners later this spring. Consult a lawn care professional for more information about Tenacity herbicide.
Leftover annual grassy weeds
Annual weeds such as crabgrass are always a concern and last year they seemed to be particularly troublesome. In lawns that had severe outbreaks, some of these annual grassy weeds may still be present. The good news is that you don’t have to worry about controlling leftover annual weeds. They have completed their lifecycle and are no longer alive. They did however drop seed and you may consider using a pre-emergence herbicide for the upcoming season.
Snow molds
Damage from pink and gray snow mold is most evident shortly after the snow melts. The grass will usually appear off-color and be matted down. Chemical applications to control snow molds in the spring are seldom recommended as most of the damage has already taken place. You can help your lawn by raking up the matted areas of grass with a leaf rake. Chances are there is some live turf hiding underneath. The picture below shows an area of gray snow mold on the Iowa State University central campus.
Dog spots
Damage from animal urine will definitely create brown spots in the lawn. Where you can usually count on some recovery from snow mold damage, dog spots are very effective at killing grass. The best course of action is to remove the dead grass, break up the soil with a hand trowel or rake and re-seed the area. Note: Seed will not germinate and grow if a pre-emergence herbicide is to be used. The exception to this rule is when Tenacity or Siduron herbicides are used. Consult with a lawn care professional for more information about these products.
Salt damage
De-icing materials that contain sodium can be quite harmful to turf. Brown patches or areas of turf along driveways, sidewalks, or streets could be caused from salt damage. Depending on the severity of damage, reseeding may be necessary. Aerification and watering (or rainfall) can help flush salts through the soil profile and improve the conditions of the site.
Marcus Jones
Graduate Research Assistant
Nick Dunlap
Undergraduate Research Assistant
This process has already started across parts of the Midwest and some of you may have noticed patches, or areas of brown in your lawn. It’s typical to receive a number of questions from your clients about the cause of these brown spots during spring green-up. There are a number of reasons why these patches can appear and this article will address some of the most common reasons and discuss what action, if any, is needed to remedy the situation.
Dormant warm-season grasses
Most lawns in the upper Midwest contain cool-season grasses like Kentucky bluegrass, perennial ryegrass, and tall and fine fescues. Occasionally lawns, or parts of the lawn, will contain warm-season grass species. Examples of these could include zoysiagrass, buffalograss, or nimblewill. Whereas cool-season grasses grow best in the spring and fall, warm-season grasses prefer the mid-summer months and will remain dormant (brown) longer into the spring until warmer temperatures arrive.
If zoysiagrass or buffalograss are the cause of your brown spot there isn’t much you can do other than exercise patience until warmer weather arrives. Nimblewill can be selectively controlled with Tenacity herbicide. Tenacity herbicide will be made available to homeowners later this spring. Consult a lawn care professional for more information about Tenacity herbicide.
![]() |
| Warm-season grasses such as buffalograss are still brown while cool-season grasses such a fine fescues begin to green-up. |
Leftover annual grassy weeds
Annual weeds such as crabgrass are always a concern and last year they seemed to be particularly troublesome. In lawns that had severe outbreaks, some of these annual grassy weeds may still be present. The good news is that you don’t have to worry about controlling leftover annual weeds. They have completed their lifecycle and are no longer alive. They did however drop seed and you may consider using a pre-emergence herbicide for the upcoming season.
| Goosegrass, an annual grassy weed, is still present from the previous growing season. |
Snow molds
Damage from pink and gray snow mold is most evident shortly after the snow melts. The grass will usually appear off-color and be matted down. Chemical applications to control snow molds in the spring are seldom recommended as most of the damage has already taken place. You can help your lawn by raking up the matted areas of grass with a leaf rake. Chances are there is some live turf hiding underneath. The picture below shows an area of gray snow mold on the Iowa State University central campus.
![]() |
| Gray snow mold on the Iowa State University campus. |
Dog spots
Damage from animal urine will definitely create brown spots in the lawn. Where you can usually count on some recovery from snow mold damage, dog spots are very effective at killing grass. The best course of action is to remove the dead grass, break up the soil with a hand trowel or rake and re-seed the area. Note: Seed will not germinate and grow if a pre-emergence herbicide is to be used. The exception to this rule is when Tenacity or Siduron herbicides are used. Consult with a lawn care professional for more information about these products.
| Man's best friend. Undoubtedly charming, but damaging to grasses. |
Salt damage
De-icing materials that contain sodium can be quite harmful to turf. Brown patches or areas of turf along driveways, sidewalks, or streets could be caused from salt damage. Depending on the severity of damage, reseeding may be necessary. Aerification and watering (or rainfall) can help flush salts through the soil profile and improve the conditions of the site.
Marcus Jones
Graduate Research Assistant
Nick Dunlap
Undergraduate Research Assistant
Monday, March 21, 2011
Tried and True Perennials - and Some New Ones Too
| Purple coneflower is well suited for full sun areas while providing interest to your landscape. Check out the rest of the recommendations below. |
Perennials are often the backbone of beautiful and long-lasting ornamental plantings. As a group they provide colorful flowers and foliage, a variety of shapes and forms, and a mix of textures from the fine, delicate leaves of ornamental grasses to the bold, coarse texture of large leafed hostas. Perennials can also grow in a variety of light and soil conditions. This means there is a perennial, or two or three or more, for just about any location in the landscape.
Compared to annuals, perennials are less expensive in the long-run because they don’t need to be replanted each year and most tend to bloom well with minimal to no additional fertilizer, provided they are planted in good soil to start with. And, they only need a little attention in the spring to cut back the previous year’s foliage before they start growing again.
Spring is a great time to think about designing and installing a new perennial bed. Maybe you want to draw attention to the clubhouse, a tee box or the entry to your facility. Or maybe you have an existing bed that needs to be reworked to give it a little more pizzazz. Regardless of your situation, matching the right perennial to the growing conditions is important for the planting to be a success.
Below is a short list of tried and true perennials that thrive in our Midwestern climate. Many of these plants are familiar and used frequently in the landscape because they are easy to find in the trade and easy to grow.
![]() |
| Black-eyed Susan |
Rudbeckia fulgida; Black-eyed Susan
Echinacea purpurea; Purple coneflower
Achillea; Yarrow
Asclepias tuberosa; Butterfly Weed
![]() |
| Hosta |
Astilbe;
Hosta;
Heuchera; Coralbells
Mertensia virginica; Virginia Bluebells
Here are some lesser know perennials that also do great in the Midwest. These plants may be a little harder to find, but they are well worth including. Most of these provide summer long interest either because of their unique foliage or because of their one to two month flowering period. Including any of these plants will give your planting a fresh look and be a nice change from the ordinary.
Lesser-Known Perennials for Sun
Amsonia hubrichtii; Narrow Leaf Blue Star, Arkansas Amsonia
Stachys officinalis ‘Hummelo’; Wood Betony
Stachys grandiflora 'Rosea'; Big Pink Betony
Allium 'Summer Beauty'; Summer Beauty Allium
Ann Marie ZanDerZanden
Professor & Associate Director for ISU Center for Excellence in Learning and Teaching
Iowa State University
Wednesday, March 9, 2011
March Mega!
I’m on the road this week and my travels have taken me to our neighbor up north. I’m in the Twin Cities area to speak at the March Mega Seminar hosted by the Minnesota Golf Course Superintendents Association. There was some great content on the first day with Dr. Nick Christians (Iowa State Univ.) covering soil testing and interpretation and Dr. Mike Richardson (Univ. of Arkansas) tackling foliar fertilization and nutrient uptake. I’m going to be discussing blog use in the turfgrass industry and how this technology can be used to promote yourself and your facility. I want to thank Eric Counselman and Jeff Ische, Conference and Education Co-chairs for the invitation to speak.
Of course, it wouldn’t be fitting to make a trip to Minnesota in the winter without receiving a little snow, right? Snow is something Minnesota knows well, especially this year. I did a little digging and found some interesting Minnesota weather data.
The current winter is the ninth snowiest so far in the Twin Cities area. Through March 6, the Twin Cities area has received 78.3 inches of snow for the season. This ranks as the 9th snowiest winter on record. Minnesota also recorded the 5th largest snowfall in a single day this winter season when the Twin Cities received 17.1 inches back on December 10-11.
The snowiest season on record is the winter of 1983-84 with 98.6 inches. Iowa’s snowiest winter of 1911-1912 recorded 72 inches. This doesn’t even rank in the top ten snowiest winters for the Twin Cities, yikes.
Top Ten Snowiest Winters in the Twin Cities 1884-2011 (numbers are measured in inches).
1. 1983-84 ....... 98.6
2. 1981-82 ....... 95.0
3. 1950-51 ....... 88.9
4. 1916-17 ....... 84.9
5. 1991-92 ....... 84.1
6. 1961-62 ....... 81.3
7. 1951-52 ....... 79.0
8. 1966-67 ....... 78.4
9. 2010-11 ....... 78.3 (through March 6)
10. 2000-01 ..... 75.8
The weather does seem to be turning despite this last snow event. The extended forecast looks promising with daytime highs reaching into the 50’s and nighttime lows staying slightly above the freezing mark. The four inch soil temperatures across Iowa are still hovering around the freezing mark. These warmer temperatures would certainly change that and would help remove the frost and allow water to drain into the soil. Greens covers will certainly be coming off soon back in central Iowa.
Don’t forget to move your clocks one hour ahead this weekend. Another sign Spring will soon be here!
Marcus Jones
Graduate Research Assistant
Wednesday, March 2, 2011
Blog Use in the Turfgrass Industry
March is officially here which means that another growing season is fast approaching. iaTURF will already be entering its third year in operation! We will continue to bring you timely updates on interesting topics through the blog.
Blogging and the use of social media have really changed the way people communicate. In the academic world, one way we communicate with our peers is by writing papers, or manuscripts. To let people know about the success of blogging as a means to communicate with turfgrass professionals, iaTURF co-authored a paper with the Turf Disease Blog.
The Turf Disease Blog is one I like to follow. Content for this blog is provided by turfgrass pathologists across the U.S. If you’re not familiar with their blog you should definitely check it out.
A summary of our article is below. Click here to read the full article from the Journal of Extension.
Using Blogs to Disseminate Information in the Turfgrass Industry
Jones, Marcus A.; Kaminski, John E.; Christians, Nick E.; Hoffmann, Mark D.
The ability to provide regional information to turfgrass professionals in a timely format can help them avoid potential problems. While traditional, hard-copy based Extension materials can provide a wealth of information, the ability to communicate brief yet current updates can be invaluable. Two Web-based blogs were developed to provide information to turfgrass managers on a local (iaTURF) and international level (Turf Diseases). Data indicated that the blogs reached an average of 34.9 to 148.4 people per day. The use of blogs is an effective means to deliver timely information to a geographically diverse and large number of turfgrass managers.
Marcus Jones
Graduate Research Assistant
Tuesday, February 22, 2011
INTERNSHIP AT INTERLACHEN CC IN EDINA, MN: BY JARED OLSEN
Nick Christians
February 22, 2011
The following is part of an internship by undergraduate student Jared Olsen, who spent the summer at Interlachen CC in Edina, MN.

February 22, 2011
The following is part of an internship by undergraduate student Jared Olsen, who spent the summer at Interlachen CC in Edina, MN.

Interlachen Country Club is located near downtown Edina in the Twin Cities. Interlachen was founded in 1909 when a few members of the BrynMawr Golf Club met to discuss the possibility of founding a new golf club. They took an option on three farms for a total of 146 acres. The terrain had rolling meadows, good wooded areas, and adequate water development. With the final purchase, work was begun on the grounds in March of 1910, and on the Clubhouse in November of 1910. The Club had nine holes and the course was formally opened on July 29, 1911. The course was designed and laid out by William Watson, the noted golf architect of that time, and with the exception of a few minor changes, remained as originally designed and built until 1919. During those earlier years it was rated, as it is now, one of the best courses in the country. In 1919 a new school of designers, brought about by the ever-improving conditions of play, caused the Board of Governors and the membership to call in Donald Ross, one of the best golf architects of this time. Mr. Ross was asked to submit a completely redesigned layout. Work started in 1919 and was completed in 1921. The course, with minor exceptions, remains his design today and is a Golf Digest top 50 private course.
I took this summer job at Interlachen to gain some valuable experience from another midwestern golf course. I have worked at three Iowa golf courses over the past four years, but I really wanted to broaden my horizons and see how things are done at high dollar private courses. I also saw this as an opportunity to broaden my horizons in the turf industry and to meet some new people. I started my internship on Monday May 17th. Overall, it was a great experience. The people and the staff are great and the membership is very laid back. The internship was a great learning experience and also came with some other great benefits. They provided free housing, free meals, uniforms, golf privileges, and had very good pay including a bonus program. As an intern, I was introduced to almost everything that a superintendent might encounter. I mowed, sprayed, did irrigation work, and helped with many other projects.
I would highly recommend this internship to any student who is eager and willing to learn hands on at a great facility. I am very pleased that I had the opportunity to work at the Interlachen. The experience helped me realize that I am on the right career path and I enjoyed seeing how a course of this stature operates behind the scenes. I felt that my past work experiences assisted me in many ways at Interlachen, but I also learned many new thing by being in a different region. of the country. I had a very positive performance review at the end of experience which helped boost my confidence. I lived, worked and breathed the course while I was there. Staying in the on-site living quarters with six other interns who worked in the clubhouse was also a very good learning experience. The entire summer internship was a very valuable experience for me.
Subscribe to:
Posts (Atom)






