Question

which is the main crop in the European plains​

Answer 1

Answer:

The traditional two-field system of crop rotation, in which half the agricultural land was left fallow each year to maintain soil fertility, gave way to the more sophisticated three-field system: in addition to the usual sowing of wheat, barley, or rye in the autumn, another part of the land was planted in oats or ...

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Answer 2

Answer:

The traditional two-field system of crop rotation, in which half the agricultural land was left fallow each year to maintain soil fertility, gave way to the more sophisticated three-field system: in addition to the usual sowing of wheat, barley, or rye in the autumn, another part of the land was planted in oats