Miles Bennett
The speed of a golf green refers to how easily a golf ball rolls across it and, therefore, how hard a golfer has to putt the ball to make it reach the hole. This speed is measured using a tool called a Stimpmeter, which looks like a yardstick with a V-shaped track down the middle. The Stimpmeter was invented in the 1930s and was adopted by the United States Golf Association (USGA) for measuring green speeds in the 1970s. Since then, stimp ratings have generally increased, with greens getting faster over time. For example, while it was common for championship greens to have a stimp rating of 5 or 6 in the 1960s, today most championship greens have a rating of at least 10 or 11.
| Characteristics | Values |
|---|---|
| Green speed | The speed of a green refers to how easily a golf ball rolls across it, and how hard a golfer has to putt the ball to make it reach the hole. |
| Stimp rating | A green's stimp rating is given as a number, typically a single digit or a lower teen number. A rating of 7 is very slow, while 13 or 14 is considered lightning-fast. |
| Factors influencing speed | Grass type, mowing techniques, and moisture levels. |
| Average speed | On average, courses measure around 8-10 feet on the Stimpmeter, with tournament greens reaching 11-12 feet or more. |
| Reading greens | To read a green, a golfer should identify the highest and lowest sides, as the ball will curve from high to low. This is known as the fall line. |
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What You'll Learn
Green speed and stimp rating
The speed of a golf green is a crucial factor in the game, influencing how easily a golf ball rolls and, consequently, the force required to putt it into the hole. The speed of a green is measured using a device called a Stimpmeter, which determines the speed by applying a known velocity to a golf ball and measuring the distance travelled in feet. Designed in 1935 by golfer Edward S. Stimpson, Sr., the Stimpmeter resembles a yardstick with a V-shaped track down the middle, acting as a small ramp for the ball.
The Stimpmeter provides a numerical value, known as the "stimp" or "stimp rating," which golfers also refer to as the "green speed rating." This value can range from a single digit to the lower teens. A green speed of 7 is generally considered slow, while a speed of 9 is moderate. Most PGA Tour venues feature green speeds of around 12, while a stimp rating of 13 or 14 is considered exceptionally fast.
Over the years, stimp ratings have generally increased, indicating faster green speeds. For instance, the greens at Augusta National, which hosts The Masters, had a stimp rating below 8 in 1978, but by 2017, the speeds had increased to 12 or higher, depending on weather conditions. Similarly, the greens at Oakmont, a frequent host of the U.S. Open, had a stimp rating below 10 in 1978 but reached 13 or higher by 2017.
It is worth noting that weather conditions can impact green speeds, with high winds in tournaments like the British Open potentially resulting in slower speeds to ensure fair play.
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Grass type, mowing techniques and moisture levels
The grass type, mowing techniques, and moisture levels are critical to the maintenance of golf greens. Each grass type has unique characteristics and requirements that influence its suitability for specific regions and maintenance practices.
Grass Type:
Grass types commonly used on golf courses include Bermuda, bentgrass, rye, fescue, bluegrass, paspalum, zoysia, and St. Augustine. The choice of grass depends on various factors, such as climate, soil conditions, maintenance requirements, and the desired playing experience. For example, Bermuda grass is prevalent in warm climates and can withstand low moisture conditions, while bentgrass is ideal for colder climates and requires more frequent maintenance.
Mowing Techniques:
Mowing plays a crucial role in achieving the desired grass height and smoothness of the green. The mowing height can vary depending on the grass type, with Bermuda grass and bentgrass often mowed as low as 1/8 of an inch, while other grasses may require slightly higher mowing heights. Mowing frequency is also important, with some greens being mowed daily to maintain the desired grass length and smoothness.
Moisture Levels:
Moisture levels are essential for the health and appearance of the grass. Different grass types have varying moisture requirements. For instance, Bermuda grass requires minimal water, while bentgrass needs more frequent watering in high heat or drought conditions. Proper moisture management is crucial to ensuring the grass receives adequate water without promoting the growth of weeds or pests. Techniques such as soil moisture management products and irrigation systems can help regulate moisture levels.
Additionally, other maintenance practices, such as aeration, verticutting, rolling, and brushing, are employed to enhance the health and playability of the greens. The use of fungicides, pesticides, and herbicides also contributes to maintaining the quality of the grass.
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How to read greens
Reading greens is an essential skill that can significantly improve your golf game. Here are some tips on how to read greens effectively:
Start by considering your surroundings and taking in the lay of the land. Observe the position of the sun and any shadows, as these can impact your perception of the green. Be mindful that shadows may exaggerate slopes, making breaks appear more significant than they are. Take note of the undulations and get a sense of the overall terrain.
When you arrive at the green, position yourself at the lowest point of the hole. This vantage point will allow you to see the intricate details of the putt you're about to roll. From this low side of the putt, you can better visualise the entire break. Then, take a look at your putt from behind the ball, and divide the putt into three parts. This technique helps you focus on specific sections and make more accurate judgments.
Additionally, you can employ the plumb-bob method to gauge the slope of the green. Hold your putter by the grip and let the head dangle. Align the shaft with your target line and observe the direction in which the putter head hangs. If it points left, the green slopes left, and vice versa. This technique helps you determine the overall break of the putt.
Lastly, step into your putt. Stand directly behind your ball and walk into your putt, focusing on a spot one inch in front of the ball. This process helps you lock in your mind and improves your accuracy. By consistently refining your green-reading abilities, you'll gain a competitive edge and enhance your overall golf experience.
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The evolution of golf balls
The golf ball has come a long way since the early days of the sport in the 1400s, when the game was first played in Scotland. The evolution of the golf ball has had a significant impact on the development of the game, its rules, and the equipment used.
The Early Days
The first golf balls were likely just round rocks or pebbles, but the earliest man-made golf balls were made of wood, probably hardwoods like beech or boxroot. These wooden balls, used in conjunction with wooden clubs, would have made for a rather jarring experience on the course.
The Feathery Ball
In the early 1400s, a new type of golf ball emerged: the "feathery". This ball was a leather sack filled with boiled goose feathers and then stitched up and painted. The time-consuming process of making these balls made them expensive and only affordable to the privileged few. The leather was crafted while still wet, and as it dried and shrank, the feathers expanded, creating a hardened ball.
The Guttie Ball
In the late 1800s, a new type of ball was created accidentally. It was discovered that nicks and indentations in a ball made of guttie (gutta-percha) provided a more consistent flight than a smooth ball. Makers began intentionally carving patterns into the surface of new balls, and these became known as "brambles".
The Rubber Haskell Ball
In 1898, Coburn Haskell of Cleveland, Ohio, created the 20th-century wound golf ball. While waiting for a golf date, he picked up some rubber thread, wound it into a ball, and bounced it. The result was a ball that flew almost to the ceiling. This new design, covered with a thin outer shell made of balatá sap, soon replaced the guttie bramble ball.
Modern Balls
In the mid-1960s, new synthetic resins and ionomers were introduced, displacing balatá as they were more durable and resistant to cutting. Golf balls evolved to be classified as two-piece, three-piece, or four-piece balls, depending on the number of layered components. Today, golf balls can be customized to a player's strengths and weaknesses, with advancements in aerodynamics and dimple patterns to improve performance.
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Green speed maintenance
Firstly, it is important to recognise that green speed is not a static value. It fluctuates daily due to various factors, including temperature, humidity, rainfall, and routine maintenance practices. These factors can cause the greens to play faster or slower, impacting the speed at which the ball rolls and the force required by golfers to putt the ball to the hole.
Maintaining a consistent green speed throughout the year is nearly impossible due to these ever-changing conditions. Additionally, the appropriate green speed for a course depends on several factors, such as putting green design, grass type, golfer ability, and course location. A green speed that is ideal for one course might be too fast for another course with different green contours or golfers of varying skill levels.
To achieve faster green speeds, golf course managers may employ several practices, including lowering mowing heights, regular topdressing, verticutting, and hand watering. These methods require significant investments of time and resources, which may be beyond the budget of many golf courses. Additionally, periods of high heat, humidity, and other environmental stressors can negatively impact the health of the putting greens.
Maintaining green speed also requires consideration of the putting green quality. Sacrificing other aspects of quality, such as turf health, to achieve faster speeds can lead to higher maintenance costs, turf damage, and undesirable playing conditions. Therefore, it is crucial to strike a balance between speed and overall green quality to ensure a positive golfing experience.
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Frequently asked questions
"Green speed" refers to how easily a golf ball rolls across the green, and how hard a golfer has to putt the ball to reach the hole.
Green speed is measured using a tool called a Stimpmeter, which looks like a yardstick with a V-shaped track down the middle. Golf course superintendents or tournament officials measure green speed by rolling balls down the Stimpmeter onto a flat part of the green.
A green speed of 7 is generally considered very slow, while a speed of 9 is considered moderate. A stimp rating of 13 or 14 is considered lightning-fast. Most PGA Tour venues have green speeds of around 12.
In general, stimp ratings have increased over the years, meaning green speeds have gotten faster. This is due in part to advancements in equipment and maintenance practices, as well as the adoption of the Stimpmeter for measuring green speeds in the 1970s.
Grass type, mowing techniques, and moisture levels all contribute to green speed. Proper maintenance is crucial in achieving the desired speed.
