We grow rice in the south of the States,but in the north where it iscolder they grow wheat.画主谓宾

We grow rice （in the south of the States）,（but）
主 谓 宾 地点状语 （并列连词）
in the north （where it iscolder they grow wheat）.
地点状语 （修饰“北方”的定语从句）