Generally, a given field is considered to be in a particular stage when 50 percent or more of the plants have reached or gone beyond that stage. Occurs approximately 10 days after the tassel first begins to emerge from the sheath or 2-4 days after the tassel is emerged. Normally half of the kernels are showing dent with some thick or dough-like substance in all kernels. Occurs when all kernels are fully dented and the ear is firm and solid. There is no milk present in most kernels.
Corn is about ready to harvest with shucks opening and there is no green foliage present.
Leaves near the bottom of the plant are yellow and dropping, while leaves at the very top may still be green. Leaves are 30-50 percent yellow.