Not of my lines but this looks like your Fredrick.He apparently came to Iowa about 1874.
1880 US Census for Clayton County, Iowa, Read Township, ED 145, Page 524A (5), 50/50
Frederick Diers, Self, M, 32, M, Farmer, Oldenberg, Oldenberg, Oldenberg
Margaretha, Wife, F, 31, M, Keeping House, Oldenberg, Oldenberg, Oldenberg
Henry, Son, M, 6, IA, S, Oldenberg, Oldenberg
Karoline, Dau, F, 4, S, IA, Oldenberg, Oldenberg
Herman Diers, GFather, M, 92, W, Oldenberg, Oldenberg, Oldenberg
Franz Possehe, Other, M, 17, S, Servant, Meklenburg, Meklenburg, Meklenburg
Carl Lauch, Other, M, 13, S, Servant, Meklenburg, Meklenburg, Meklenburg
Mina Klepien, Other, F, 21, S, Servant, Prussia, Prussia, Prussia
There are cemetary records for Diers of the same names and that match the ages in Clayton county, Iowa.
Fredrich W. Diers, 1848 to 03 Oct 1925, Clayton Center Cemetery
Margarethe Diers, 1849 to 02 Feb 1917, Clayton Center Cemetery
Some older Diers also in Clayton Center Cemetery
Johann Diers, 1818 to 1871, Clayton Center Cemetery
Margaretha Diers, 1816 to 1876, Clayton Center Cemetery
Johann Harm Diers, 1788 to 1883, Clayton Center Cemetery
There is a Henry Diers in Nebraska in 1920 that matches up fairly well.
1920 US Census for Lancaster County, Nebraska, Lincoln City, Part of Precinct C Ward 6, Page 218B (22B), ED 77, 562/572
Henry Diers, Head, 60, M, IA, Oldenberg Ger, German, Oldenberg Ger, German, Proprietor, General Store
Winifred, Wife, 50, M, NE, MO, NC
Francis H., Son, 21, S, NE, IA, NE
Good hunting, Frank