___________ is used to locate a position in a field.

GPS, or Global Positioning System, is utilized to determine a specific location within a field, making it crucial for modern agricultural practices. It operates through a network of satellites that transmit signals to GPS receivers on the ground, providing precise coordinates based on latitude and longitude. This technology enables farmers and crop advisors to accurately assess field conditions, manage resources effectively, and optimize field operations by pinpointing specific locations for planting, irrigation, and harvesting.

In contrast, GIS (Geographic Information Systems) is a broader framework that involves the collection, analysis, and visualization of geographical data. While it can utilize GPS data, its primary function is to manage and interpret spatial information rather than directly locating positions.

Remote sensing refers to the acquisition of data from a distance, typically through satellite or aerial imagery, to gather information about the field's condition rather than determining an exact location. It provides insights into crop health, soil moisture, and other large-scale environmental factors.

Field mapping involves the manual or digital documentation of field features and variability, which aids in management decisions. However, it is more of an interpretative process rather than a direct method for pinpointing locations in real-time, like GPS can do.

Thus, GPS is the best choice for identifying a precise position in