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What defines a Differential Global Positioning System (DGPS) in pesticide applications?

It assists with visual navigation
It provides basic positional information
It offers positional accuracy sufficient for applications
It requires manual input for positioning

The correct answer is: It offers positional accuracy sufficient for applications

A Differential Global Positioning System (DGPS) is specifically designed to enhance the accuracy of GPS measurements, making it highly relevant for applications where precise positioning is essential, such as in pesticide applications. The primary function of DGPS is to correct the position data provided by standard GPS systems, which can have inaccuracies due to various factors like atmospheric conditions and satellite geometry. In the context of pesticide applications, precise positioning ensures that chemicals are applied exactly where needed, minimizing waste and reducing the risk of drift to non-target areas. This capability is crucial for environmental protection and compliance with regulatory standards. DGPS can achieve accuracy levels within a few centimeters, which is significantly better than standard GPS that may have positional errors of several meters. Therefore, the correct answer aligns with the importance of accuracy in managing pesticide applications effectively and responsibly.