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farmers / arable / changing/ rotation / land / soil

1. ............. crops such as oat and wheat require good 2. ............. and warm climate to be grown successfully.
They require flat 3. ............. that allows machinery such as combine harvesters to be used.
Arable 4. ............. often use crop 5. ............. methods to maximise their crop growth. Crop rotation involves 6. ............. what crops are grown in fields each year for a period of time - commonly seven years