CHAPTER 2 TOOLS IN PA_AGR638

What is the primary function of the Global Positioning System (GPS)?

• To navigate using satellite signals

• To provide weather forecasts

• To measure soil moisture

• To analyze crop health

What process is used by GPS to determine the location of an object?

• Trilateration

• Triangulation

• Transformation

• Translocation

Which of the following is a source of error that affects GPS accuracy?

• GPS receiver brand

• Weather conditions

• Satellite clocks

• User's physical location

What does DGPS stand for?

• Dynamic Global Positioning System

• Differential Global Positioning System

• Digital Global Positioning System

• Direct Global Positioning System

Which system provides differential correction signals for navigation in agricultural?

• FAA WAAS

• DGPS

• RTK

• VRS

What is the main purpose of Remote Sensing in agriculture?

• To monitor weather patterns

• To measure soil pH

• To assess crop status from a distance

• To calculate fertilizer needs

What does NDVI stand for in the context of remote sensing?

• Normalized Difference Vegetative Index

• National Data Vegetation Index

• Natural Density Vegetation Index

• Non-Differential Vegetative Index

Which of the following is NOT a type of yield sensor mentioned?

• Impact sensors

• Weight-based sensors

• Thermal yield sensors

• Optical yield sensors

What is the primary function of Geographic Information Systems (GIS)?

• To create weather models

• To analyze soil samples

• To display digital maps with underlying databases

• To monitor crop growth

Which of the following describes an active sensing system in remote sensing?

• It only works in clear weather

• It receives naturally emitted signals

• It requires physical contact with the object

• It generates a signal and measures the reflected signal