Corn. (Hoping some farmers will come along with corrections.)
Landing on a corn field in early May, if it was not wet or otherwise too soft might be possible.
View attachment 68279
Mature corn (mid-summer) with 8' stalks and 1/3lb ears is going to beat up the plane but you'll probably live.
View attachment 68276
Drying corn; ie fall is very hard and still several feet tall.
View attachment 68278
Corn stubble after harvest; not as clean or flat a field as you might think from the air.
View attachment 68277
Biggest concern is flipping I'd think - and for the first and last 2 cases, that depends a lot on the tilling practices; how irregular the ground is.