How Many Cornstalks in an Acre of Corn

In a prototypical acre of Midwestern farmland, about how many cornstalks are there in an acre?

Any where from 20,000 to 30,000.

It depends on quite a few factors. Generally higher plant population yields a slightly lower yield per plant, and also a higher investment in seed.

Corn planting guide from Iowa State University (PDF):

Depending on conditions a farmer will plant anywhere from 24,000-36,000 seeds per acre. Naturally a portion of them won’t germinate, will die while they’re still seedlings, etc. So 20,000-30,000 is a reasonable assumption.

One of the variables is the rainfall of the area. Corn is planted further apart in dry areas, thus fewer cornstalks per acre.

I remember back in the 1960’s, Soviet Premier Khrushchev visited an Iowa farm, and told the farmer that his corn was planted too close together. But he was wrong, he was basing it on his experience in Russian cornfields, with less rainfall than that part of Iowa.