What describes variable-rate application technology?

• A. Interventions in the vineyard are targeted based on data collected
• B. Interventions across the vineyard are random
• C. Only interventions based on vine age
• D. Applied uniformly to all plants

Answer: (C)

Variable-rate application technology means applying inputs at different rates across the vineyard based on data collected about each location’s needs. It uses site-specific information—like soil tests, moisture, vine vigor maps, and sensor data—to tailor interventions so that more input is used where the crop needs it and less where it doesn’t. This targeted approach improves efficiency and reduces waste.

The other descriptions don’t fit because random interventions ignore data, focusing on chance rather than measurement; relying only on vine age misses spatial variability across the vineyard; and applying inputs uniformly treats every plant the same, ignoring local differences in need.