What may alert a pilot to hidden hazards in a field?

Breaks in normal cultivation patterns can serve as significant indicators of hidden hazards in a field. When a pilot observes irregularities in how a field is cultivated, it may suggest the presence of something unusual, such as soil compaction, drainage issues, or even areas where pesticides or herbicides may not have been applied correctly. These irregular patterns can signal the presence of obstacles or hazards that could affect the safety and effectiveness of aerial application.

The other options, while they can provide some information about the field, do not necessarily point to hidden hazards with the same clarity. Regular pest signs may indicate pest pressure but do not inform about physical dangers. Changes in soil color could signify various conditions but may not directly correlate with immediate risks. Similarly, the presence of farm equipment can be a straightforward visual cue for caution but does not directly reveal hidden hazards lying beneath the surface of cultivation practices. Understanding these cultivation patterns is essential for maintaining safety and ensuring effective aerial application.