Arable land is a land that is used for the production of rich agricultural products and is a fertile land that constitutes of the goods' ecological services to man and is thus is not a restrictive feature to the people living.
Sparta was known for their extreme war skills and judging by history Athens was a capital city and most of the soldiers of Greece came from Sparta I guess
Floods! Floods don't really happen to much, but there was a big one which caused the land to become super moist. Which made it difficult to do Dry Farming. I hope this helped! :)