I'm talking about it from Nevill's point of view. If he hadn't died that night, Sheila might have thought his Will was unfair. It's not as if he cut Jeremy out if he didn't keep farming, he simply divided his assets between them, which is fairly normal.
According to some farming friends, a division between a son and daughter is usually 70/30 on the presumption that the son will be running the farm and eventually supporting a wife and family, whereas a daughter will have a husband to support her. Of course, this wasn't the case with Sheila, who, it seems, was always going to need financial support..................so, too, would her boys.