What is the required ratio of sand to native soil for a field to be considered sand modified?

In the context of sports facility management, particularly when discussing field construction and maintenance, a field is classified as "sand modified" based on its composition of sand relative to native soil. The correct standard for sand modification typically involves a higher proportion of sand, such that a 60 percent sand to 40 percent native soil ratio is recognized.

This combination allows for improved drainage and aeration, which are crucial for maintaining optimal playing conditions and promoting healthy grass growth. The addition of sand modifies the soil structure, enhancing the field's performance during various weather conditions and reducing compaction.

The other ratios presented do not meet the standard requirements typically defined for sand-modified fields. Ratios that involve 70 percent or higher sand content might classify the field as sand-based instead of just sand modified, while a 50 to 50 ratio does not provide a sufficient amount of sand for the intended benefits associated with sand modification.