The USGA Library collection is the world's largest and most significant related to golf history, containing more than 100,000 individual items in more than 25 languages documenting golf's development ...

Purpose of Rule: Rule 14 covers when and how you may mark the spot of your ball at rest and lift and clean your ball and how to put it back into play so that your ball is played from the right place.

Deborah Platt Majoras, of McLean, Virginia, is in her sixth year as a member of the USGA Executive Committee. Majoras serves on the Board of Directors of American Express, of Valero Energy Corporation ...

Purpose of Rule: Rule 16 covers when and how you may take free relief by playing a ball from a different place, such as when you have interference by an abnormal course condition or a dangerous animal ...

Purpose of Rule: Rule 5 covers how to play a round – such as where and when a player may practise on the course before or during a round, when a round starts and ends and what happens when play has to ...

Purpose of Rule: Rule 6 covers how to play a hole – such as the specific Rules for teeing off to start a hole, the requirement to use the same ball for an entire hole except when substitution is ...

Purpose of Rule: Rule 4 covers the equipment that players may use during a round. Based on the principle that golf is a challenging game in which success should depend on the player’s judgment, skills ...

Purpose of Rule: Rule 10 covers how to prepare for and make a stroke, including advice and other help the player may get from others (including caddies). The underlying principle is that golf is a ...

Growth potential is a concept that was developed by Pace Turf to express the relative growth rate of turfgrass at a given temperature. According to this model, the maximum growth rate of cool-season ...

Purpose of Rule: Rule 19 covers the player’s several relief options for an unplayable ball. This allows the player to choose which option to use – normally with one penalty stroke – to get out of a ...

Purpose of Rule: Rule 15 covers when and how the player may take free relief from loose impediments and movable obstructions. These movable natural and artificial objects are not treated as part of ...

5.2 Practising on Course Before or Between Rounds 5.2b/1 – Meaning of “Completing Play of His or Her Final Round for That Day” in Stroke Play In stroke play, a player has completed his or her final ...