"God, what a woman! And it's come to this,
A man can't speak of his own child that's dead." (73-74)
It's not that his wife's a difficult kind of person in general, but she's a difficult "woman." This line almost makes it seem as if her extreme femininity, her womanliness, is to blame for the problems in their relationship.
"Three foggy mornings and one rainy day
Will rot the best birch fence a man can build." (96-97)
Ah, manly men. They know all about fences and the weather. But maybe they should cool it on the Farmer's Almanac wisdom when they've just dug a grave for their dead kid. Right?
"I'll follow and bring you back by force. I will!—" (120)
This line shows the physical dominance of the male gender. As his wife tries to get out of the house, he threatens to bring her back, even if he has to force her. That's one power this woman clearly doesn't have.