Pg 350
This does not happen all the time. If the cost for just transporting the crop to the market is more than the difference of the cost of the land and the selling price of the crop per land area, then there will be a net loss of money for a given land area.
Therefore, farmers must have:
1) a farm that is close to the market
2) crops that will sell for prices higher than the cost to sustain for the land itself upon which the crop is grown
3) crops that fit number 2 and also has a low cost of transportation to the market.