Variable Rate Technology

Variable-rate technology (VRT) describes any technology which enables producers to vary the rate of crop inputs.  VRT combines a variable-rate (VR) control system with application equipment to apply inputs at a precise time and/or location to achieve site-specific application rates of inputs.  A complement of components, such as a DGPS receiver, computer, VR software, and controller are integrated to make VRT work.  A site-specific approach allows growers to apply products only where they are needed in a field.  Varying the application of inputs can reduce input and labor costs, maximize productivity, and reduces the impact over-application may have on the environment.  Examples of VR applications for agriculture include fertilizer, lime, seeding and pesticides.

Publications

• Calibrating Equipment with Variable-Rate Technology
• Introduction to Prescription Maps for Variable-Rate Application Introduction
• On-the-go Crop Sensing
• Overview of Automatic Section Control Technology
• Overview of Variable-Rate Technology
• Soil Electrical Conductivity
• Winter/Spring Equipment Maintenance: Calibrating Equipment with Variable-Rate Technology

Presentations

• Overview of Precision Ag Applications for EQIP
• GPS/GIS Applications for Farming Systems
• Variable-Rate Application: How does it work?

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