12. Why is a leguminous crop
rotation used in agriculture?

Gap-fill exercise

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Leguminous crop rotation and
crop rotations are used agriculture
because in these many bacteria
important for nitrogen cycle live.
The crop rotation (or
cojointly the main crop) helps
soil to become rich nitrates that are
then by the plants.

Green , the covering of the
with grass and leguminous , is
also a way improve the fixation of
and it is an in avoiding
chemical fertilizers.