Nobody is out beating doors to sell native soil fields. The reason is plain—a contractor might make $20,000 profit for building a native field. But those board members are going to write out a check for $100,000 profit to the contractor for a synthetic field.
Wetness and wealth key foes of native soil fields
Even the trustees who drive to board meetings in a Lexus know that financial times are tough. This is a good time for sports turf managers to talk dollars and “sense,” whether the conversation happens at a school or a recreation department.
Nobody is out beating on office doors to sell native soil fields. Synthetic infill turfs have had a huge impact on the market. The reason is plain—a contractor might make $5,000 profit for crowning a natural field or even $20,000 for building one. But those Lexus-driving board members are going to write out a check for $100,000 profit to the contractor for a synthetic field. So, which do you expect the contractor to push?
“Don’t mistrust your contractor, just know how to talk to him,” says A.J. Powell, turf specialist at the University of Kentucky. While he concedes there are many good places for synthetic fields, he maintains that people need to take another look at natural soil fields—especially from an economic point of view.
Cost of construction outweighs the maintenance cost savings gained by establishing a synthetic field. Powell figures the average annual cost of maintaining a natural soil field at about $22,000 for a custom company, a sand-based field at about $40,000 and a synthetic infill at a minimum of $3,500. The high cost of construction and maintenance of a sand-based field is perhaps beyond reason, especially when one considers their frequency of failure.
Including laser grading to build a good crown in the center of the field, natural soil fields are inexpensive to build, costing maybe an average of $50,000, Powell told field managers at the Ohio Turf Conference (OTF). Even a worn natural field will provide good, soft footing. “And nobody has shown that a muddy field is unsafe to anyone, except the guy washing uniforms,” Powell says.
Put all that on one side of the ledger and balance it with a $600,000 to $1,000,000 tag for a new sand field or new synthetic infill field.
“Sand-based fields are just as expensive as artificial fields and work no better than most natural soil fields,” Powell points out. When factoring in the cost of construction and maintenance, the natural soil fields will always be some $42,000 to $56,000 per year less expensive than synthetic or sand-based fields.
”Most of the money spent on an artificial field is getting rid of excess rain water,” Powell says. Water is a problem on natural soils, too. But there are a lot of agronomic things a sports turf manager can do to reduce the problem.
“Yes, natural fields can get sloppy. No, they are not always uniformly aesthetic,” Powell concedes. “But there is a big cost savings by going with natural turf and doing it right.”
The best place to start improving any natural soil field is to work to get the field into as good shape as possible to start the season. That may sound like Turf 101, but it is good advice.
“People like to play on a quality field. Yes, they may wipe it out. But that is just a fact of life,” Powell says. Whenever a really great field is developed, there is enormous pressure for more and more teams to use the field.
However, limiting use on the premier natural fields can certainly help. This seems to be less a problem on baseball fields than anywhere else. Baseball coaches have been successful at lobbying to keep people off their fields. Perhaps they feel a closer affinity with the actual field. Perhaps they can sell the importance of “true” ball roll on the surface. Whatever the reason, baseball fields seem to have less wear and tear. As a result, they hold up better than football or soccer fields.
Perhaps big, rectangular fields simply lend themselves to more use: football, soccer, band practice, intramural games. But that’s no reason why the fields cannot be prepared well and maintained well.
“Sometimes they spend more money on the paint scheme for the endzones than they do on the field itself,” Powell scoffs. “If you have to cut costs, you should be talking about places other than the agronomics.”
Powell sees no reason why a native soil field should not be able to carry one or two teams for two playing seasons per year—as long as the field is dry. He says he has seen successful programs handle 70 events a year, again citing the importance of keeping the field dry and not displacing the soil.
Water, athletics don’t mix
No coach today would deprive an athlete of water. However, a good sports manager is better served by doing exactly that with the field.
“Especially on football fields, traffic on wet soil displaces the soil, destroys the soil structure and creates little birdbaths in the field,” Powell says.
Can proper management reduce field wetness and soil saturation? “You betcha,” Powell says in his best Sarah Palin imitation.
Many agronomists have noted the money that could be saved if football games were postponed in foul weather the way baseball games are called.
“There is a price to repairing the field, and you have to teach your administrators what that cost is,” Powell advises.
Irrigation often is more the problem than the solution.
“Don’t over-irrigate,” Powell says. In fact, he would go so far as to remove the automatic clocks on irrigation systems in many parts of the country. Grounds managers would look at irrigation differently if they had to go out and turn some knobs every time they wanted to water their fields.
Anticipate rainfall, Powell says. “Dryness is not deadly. Grass does not die from dryness, at least not quickly.”
A turf manager who anticipates rainfall should turn off the system. “You cannot afford to have the field wet before a rain,” he says. He says that, if managers treated water as a line item in their own budgets then they probably would not be so liberal with it.
Any manager who is starting to see depressions in the field already has a field that has gone too far. Depressions must be repaired each year, even the first year after the field is constructed.
A simple crown, yes, even on a soccer field, will take care of most water problems.
Good sideline drains are a must. Most field managers know it does not take too much effort to get the water off the field in the area between the hash marks. But, that water must have some easy place to go quickly. Good sideline drains are a must for all fields. Sleeve drains work but unless the water gets through the soil and down into the drains, they may be totally ineffective, or effective for only a year or two.
Destroying soil structure starts a landslide of problems. A sandy topdress helps, of course, but there is more to keeping a field dry than that.
“Build tough verdure,” Powell says. A good, dense stand of grass will do much to remove water from a field. In sports turf, normal evaporation is too slow to keep a field dry enough for play. A plant with a deep root system will help remove a lot of water, and also maintain surface soil integrity, he adds.
Stick to the basics and keeping water off the field becomes straightforward.
Start with an annual renovation. Raise the height on the mower as far as the coaches will allow. Do a good job of crabgrass and broadleaf weed control. Give the turf the nitrogen it needs to thrive, but don’t over-do it. Core regularly.
Powell says that, even if a field is being cored, it probably is not being cored enough. “This is especially true in practice fields and park and recreation fields.”
He says coring is better than spiking or the other commonly used methods aimed at getting water into the ground. The problem with small-tine, solid coring is that, as soon as the soil gets wet, it quickly closes in around the hole and there is little opportunity for the water to flow down.
“If you must solid tine, it is only beneficial when the soil can be shattered, but it must be really, really dry,” Powell told the OTF audience. While it is more difficult to core dry soil, the effect of the shattering will last longer. That said, he still likes to see regular 2- or 3-inch core aeration.
To get more robust grass plants, make them taller, he says. Before the coach screams his head off about slowing down his players, let him know that research shows there is no difference between a 1.5-inch, 2-inch or 3-inch cut height and runner speed on the field. This does not, however, apply to ball roll on a soccer field.
While mowing with a reel mower will make the field look nice, doing the job with a rotary machine is just fine for most uses.
Another curse of over-irrigation is that it increases the number of times you must mow. While one’s first thought might be the labor or fuel required, Powell is more concerned about the effect of mower compaction.
Extra mowing leads to compaction, which causes weaker plants with shorter roots, which requires more irrigation, which leaves a wet soil, which causes more compaction. The downward spiral continues until the field is very fragile.
“You have no choice; your job is water management,” Powell says.
Lastly, when it comes time to reseed the field, Powell advises using a “fast” grass. In areas where bermudagrass is appropriate, it is the variety of choice. He recommends perennial ryegrass anywhere else.
“A lot of TV venues that say they are bluegrass fields are bluegrass no longer,” Powell says. “Maybe they were at one time but after a few years and several renovation seedings, they no longer have much bluegrass.”
But those well-managed, well-drained fields look good. And that proves the point that, with proper management, a local native soil field can look just as good as anything from a big-budget program. For decades we have had many great native soil fields maintained on relatively low budgets, so why can we not do that now?” Powell asks.
Curt Harler is a veteran free lance writer on turf and agricultural topics. He can be reached at email@example.com.