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.

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.

joseph stalin's cult of personality became a prominent part of soviet culture in december 1929, after a lavish celebration for stalin's 50th birthday.[answer:

explanation:

a flatwork hope this