SACE Stage 2 Agricultural Systems Practice Questions - SACE Stage 2 Agricultural Systems External Assessment Exam

How does Variable Rate Technology (VRT) optimize nitrogen fertilizer application in dryland broadacre cropping?

By applying uniform fertilizer rates across all zones regardless of soil variability By matching nitrogen rates to spatial yield potential maps and soil EC zones By doubling nitrogen rates in non-arable rocky outcrops to encourage weed growth By replacing nitrogen fertilizer with automated overhead irrigation pulses

Correct Answer:

By matching nitrogen rates to spatial yield potential maps and soil EC zones

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