Concerning the alternating fields method， which of the following are TRUE？

A.Crop seeds are sowed on the ridges in order to help them resist wind and preserve moisture.

B.Crop seeds are sowed in the furrows in order to help them resist wind and preserve moisture.

C.The furrows and ridges of the field are rotated every year.

D.This farming method increases land-use efficiency.

正确答案：Crop seeds are sowed in the furrows in order to help them resist wind and preserve moisture.The furrows and ridges of the field are rotated every year.This farming method increases land-use efficiency.