Kansas passes a statutes which says all corn must be grown

Question I - Kansas passes a statutes which says all corn must be grown and processed in a certain manner so as to avoid harmful pesticides.  This statute is challenged as being unconstitutional.  What are the two factors for the court to consider when deciding whether the statute is constitutional?

Question II - Downtown Cincinnati, in an area known as “Over the Rhine”, has long been an area of poverty containing empty and rundown buildings.  The city of Cincinnati wishes to use this area to create new businesses and spark economic development.  Would the eminent domain power allow the city to take this property from the building owners for the purpose of economic rejuvenation and elimination of “blight” within the city?  What U.S. Supreme Court case would serve as precedent for this issue?