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History, 22.12.2021 01:00 jones03riley

Use of fertilizer *crop rotation

*use of seedlings

*improved irrigation

*new types of plows

The above list describes agricultural improvements under the

A.

Song Dynasty.

B.

Sui Dynasty.

C.

Yuan Dynasty.

D.

Ming Dynasty.

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Use of fertilizer *crop rotation

*use of seedlings

*improved irrigation
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