total crop area的用法和样例：
- Interactively define the crop area for print or export.
- Because of a drought the like of which is not seen in a hundred years, there was almost a total crop failure.
- Follow the mesa between the sea plain and central mountainous country, develop for the tropical cash crop area much.
- As any prudent investors do, their very limited crop area is divided into several parts, one for self-sufficiency in the production of crops, usually food, part of the production to cash crops.
- The total area works out to 25,000 square miles.