SELECT id, ST_Collect(ST_MakePolygon(geom)) As geom
FROM (
    SELECT gid, ST_ExteriorRing((ST_Dump(geom)).geom) As geom
    FROM layer
    ) s
GROUP BY id

select geom,st_area(geom)/43560 acres from(
    select (st_dumprings((st_dump(shape)).geom)).geom geom
    from agriculture.agricultural_grtr_250) t
where st_area(geom)/43560 > .1

WITH rings AS (
  SELECT id, (ST_DumpRings((st_dump(shape)).geom)).geom
    FROM agriculture.agricultural_grtr_250
)
SELECT id,ST_BuildArea(ST_Collect(geom)) geom
from rings
WHERE ST_Area(geom)/43560 > .1
GROUP BY id;