It is difficult to preserve potatoes through the year, and impossible to store them like corn, for two or three years together. The fear of not being able to sell them before they rot, discourages their cultivation, and is, perhaps, the chief obstacle to their ever becoming in any great country, like bread, the principal vegetable food of all the different ranks of the people.
II
Of the Produce of Land Which Sometimes Does, and Sometimes Does Not, Afford Rent
Human food seems to be the only produce of land which always and necessarily affords some rent to the landlord. Other sorts of produce sometimes may and sometimes may not, according to different circumstances.
After food, clothing and lodging are the two great wants of mankind.
Land in its original rude state can afford the materials of clothing and lodging to a much greater number of people than it can feed. In its improved state it can sometimes feed a greater number of people than it can supply with those materials; at least in the way in which they require them, and are willing to pay for them. In the one state, therefore, there is always a superabundance of those materials, which are frequently, upon that account, of little or no value. In the other there is often a scarcity, which necessarily augments their value. In the one state a great part of them is thrown away as useless, and the price of what is used is considered as equal only to the labour and expense of fitting it for use, and can, therefore, afford no rent to the landlord. In the other they are all made use of, and there is frequently a demand for more than can be had. Somebody is always willing to give more for every part of them than what is sufficient to pay the expense of bringing them to market. Their price, therefore, can always afford some rent to the landlord.