By the legitimate senior members of select families or 'houses
Answer:
Popular sovereignty
Explanation:
The Missouri Compromise kept the amount of slave states and free states balanced in America. However, the Kansas-Nebraska Act reapeled the Missouri Comp. because it allowed the states to decided if they wanted to be slave or free based on popular sovereignty.
1840s
Factory-made agricultural machinery increases farmers' need for cash and encourages commercial farming
1841
Practical grain drill patented
1842
First grain elevator, Buffalo, NY
1843
Sir John Lawes founded the commercial fertilizer industry by developing a process for making superphosphate
1844
Practical mowing machine patented
1847
Irrigation begun in Utah
1849
Mixed chemical fertilizers sold commercially