Food can always purchase as much labour as it can maintain.
Almost all land produces more than enough food to maintain the labour and pay the profits, and therefore yields rent.
The rent varies with situation as well as with fertility.
Good roads, etc., diminish differences of rent.
Corn land yields a larger supply of food after maintaining labour than pasture.
In early times meat is cheaper than bread,
but later on it becomes dearer,
and pasture yields as good a rent as corn land,
and sometimes a greater one,
as in the neighbourhood of a great town,
or all over a populous country which imports corn, such as Holland and ancient Italy,
and occasionally in a country where enclosure is unusual.
Ordinarily the rent of corn land regulates that of pasture.
Improved methods of feeding cattle lower meat in proportion to bread.
The price of meat was higher at the beginning of the seventeenth century
than in 1763-4,
whereas wheat was cheaper.
The rent and profit of corn land and pasture regulate those of all other land.
The apparently greater rent or profit of some other kinds is only interest on greater expense,
as in hop, and fruit gardens,
kitchen-gardens;
and vineyards.
Land fitted for a particular produce may have a monopoly,
such as that which produces wine of a particular flavour,
or the West Indian sugar colonies,
and in a less degree the tobacco plantations of Virginia and Maryland
So the rent of cultivated land producing food regulates that of most of the rest,
and in Europe the rent of corn
If the common food was such as to produce a greater surplus, rent would be higher
for example, rice,
or potatoes.
Wheat is probably a better food than oats, but not than potatoes,
Potatoes, however, are perishable.