What is the main economic crop in the dry zone​?
this is a geography question

Dry farmed crops may include grapes, tomatoes, pumpkins, beans, and other summer crops. These crops grow using the winter water stored in the soil, rather than depending on rainfall during the growing season. Dryland farmed crops may include winter wheat, maize, beans, sunflowers or even watermelon.

Dry farming is cultivation of crops in regions with annual rainfall less thsan 750mm. Crop failure is most common due to prolonged dry spells during crop period. These are arid regions with a growing season (period of adequate soil moisture) less than 75 days.

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