Question Bank • QB_FM_055 NAT • 1 Mark

Section 2: Farm Machinery

Farm Machinery

Subtopic: Equipment for precision agriculture

Question Statement:

An optical crop sensor measured spectral reflectances from a wheat crop canopy as $40\%$ in the near-infrared band ($NIR = 0.40$) and $10\%$ in the red band ($Red = 0.10$). The Normalized Difference Vegetation Index ($NDVI$) of the canopy is ________ (round off to 1 decimal place).

Answer Key:

0.6

Step-by-Step Solution & Explanation

The Normalized Difference Vegetation Index ($NDVI$) is given by: $NDVI = \frac{NIR - Red}{NIR + Red}$ $NDVI = \frac{0.40 - 0.10}{0.40 + 0.10} = \frac{0.30}{0.50} = 0.60 \approx 0.6$
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