wide expanses of paddy fields - an "expanse" refers to a large contiguous area. In this clipping, there is more than one of these "large areas" of paddy fields. Perhaps they are separated by hedge rows or other land forms.
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SuperESL"in the foreground there was little but wide expanses of pastureland."Here is the entire passage. The view describes distant mountains, nearby hills, and a town that looked very small from the viewpoint. Certainly there was more than one large pasture in this vast scene.