Why was turnout in the South so low 1876-1968?

[ElectionsGuy]

I've been browsing through state results of presidential elections lately, and I've found a staggering difference between the turnout of former confederate states compared to turnout of everywhere else. ITs also literally once you hit the confederate states turnout immediately goes down. West Virginia had higher turnout than Virginia for most of this period despite it being half as small (or more than half) in population. Here are some examples...

1892:

Mississippi - 52,519 total votes - 9 EV's
Nebraska - 200,192 total votes - 8 EV's

1908:

Georgia - 132,504 total votes - 13 EV's
Iowa - 494,789 total votes - 13 EV's

1936:

Texas - 849,736 total votes - 23 EV's
California - 2,638,882 total votes - 22 EV's

There are countless examples, so why? Obviously there was discrimination and Jim Crow with a sizable black population, most of whom didn't vote or couldn't vote. But what else? The only other thing I can think of is lack of good education and poverty, which has always existed in the south (but turnout is better today). Discuss.

[ElectionsGuy]

I think the era the Jim Crow were passed was critical. The mass voter suppression didn't actually start showing itself until the late 19th century. For instance, I'm just going to take one state (perhaps the most corrupt state), South Carolina:

1870 Census: 705,606
1872 Election: 95,452 total votes

1880 Census: 995,577
1880 Election: 169,793 total votes

1890 Census: 1,151,149
1892 Election: 70,504 total votes

1900 Census: 1,340,316
1900 Election: 50,812 total votes

1910 Census: 1,515,400
1912 Election: 50,405 total votes

1920 Census: 1,683,724
1920 Election: 66,808 total votes

1930 Census: 1,738,765
1932 Election: 104,407 total votes

1940 Census: 1,899,804
1940 Election: 99,832 total votes

I made a thread about census population history, if you want to see that as well. So yeah, the laws definitely didn't go into affect until well after reconstruction. The laws not only made voting harder, but made voter registration harder. I can imagine many white people, especially poor white people, just said forget it, and they didn't vote. And black people probably were subject to violence if they tried to vote in that time.

[ElectionsGuy]

1920 Census: 1,683,724
1920 Election: 66,808 total votes

1930 Census: 1,738,765
1932 Election: 104,407 total votes

quite a jump there.

If I recall, that might've been when slave labor stopped, but even if its not that's still very low turnout.