Practice question · Multiple choice
In drought a crop grows taller and greener in a narrow strip. What is buried, and why does it produce that specific signal?
Hints
- Ask whether the crop is doing better or worse than its neighbours, and what a plant needs in a drought.
- A wall would produce the opposite mark. What would that look like?
Show the answer
A. A ditch or pit, whose deeper fill holds more moisture
Why
Deeper soil holds more water, so negative features show as lush positive cropmarks while walls starve the crop and produce stunted parch marks. Reading which way the mark runs tells you whether the feature was cut into the ground or built upon it, before any spade is lifted.
Practise Remote Sensing and Geophysics
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More questions on Remote Sensing and Geophysics
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