"Joshua son of Nun sent two spies out from Shittim secretly with orders to reconnoitre the country. The two men came to Jericho and went to the house of a prostitute named Rahab..."
Paul Reynolds, a writer with the BBC, noted: "Rahab, of course, was engaged in the oldest profession."
Ronald Reagan nominated politics as the second-oldest profession with the quip "It's been said that politics is the second oldest profession. I have learned that it bears a striking resemblance to the first."[3]
Other frequently named professions are doctor, philosopher, politician, lawyer, soldier, merchant and farmer.[citation needed]
Other writers write about other professions as the world's second oldest profession without stating why they should be considered the second oldest profession.[4][5][6][7][8][9][10][11][12][13][14]"
So...not agriculture, but pedantry?
(JK. All in good fun.)