catch crop(n = noun.plant) Array - a crop that grows quickly (e.g. lettuce) and can be planted between two regular crops grown in successive seasons or between two rows of crops in the same season; Array
is a kind of crop

   Any crop grown between the rows of another crop or intermediate between two crops in ordinary rotation in point of time.
"Radishes . . . are often grown as a catch crop with other vegetables." [Webster 1913 Suppl.]

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