In Encyclopedia of Women in American History, vol. 2 look up "Marriage Laws," "Divorce," and "Widowhood."
In Handbook of American Women's History look up "Agriculture, Pre-Industrial and Nineteenth Century United States."
In American Women's History: A Student Companion look up "Agriculture."
In Women in Early America look up "Agricultural Labor."
In Women's Studies Encyclopedia look up "Agriculture."
In A History of the Wife look up Chapter 6 - "Victorian Women in the Western Frontier."