Let us, however, suppose that there were a validity in this objection, which can by no means be conceded to it; that, when the demand of the community had forced up food to such a price as would remunerate the expense of producing it from a certain quality of soil, it happened nevertheless that all the soil of that quality was withheld from cultivation, the increase of produce, which the wants of society required, would for the time be obtained wholly (as it always is partially), not by an extension of cultivation, but by an increased application of labor and capital to land already cultivated. Now we have already seen that this increased application of capital, other things being unaltered, is always attended with a smaller proportional return. The rise of price enables measures to be taken for increasing the produce, which could not have been taken with profit at the previous price. The farmer uses more expensive manures, or manures land which he formerly left to nature; or procures lime or marl from a distance, as a dressing for the soil; or pulverizes or weeds it more thoroughly; or drains, irrigates, or subsoils portions of it, which at former prices would not have paid the cost of the operation; and so forth. The farmer or improver will only consider whether the outlay he makes for the purpose will be returned to him with the ordinary profit, and not whether any surplus will remain for rent. Even, therefore, if it were the fact that there is never any _land_ taken into cultivation, for which rent, and that too of an amount worth taking into consideration, was not paid, it would be true, nevertheless, that there is always some _agricultural capital_ which pays no rent, because it returns nothing beyond the ordinary rate of profit: this capital being the portion of capital last applied—that to which the last addition to the produce was due; or (to express the essentials of the case in one phrase) that which is applied in the least favorable circumstances. But the same amount of demand and the same price, which enable this least productive portion of capital barely to replace itself with the ordinary profit, enable every other portion to yield a surplus proportioned to the advantage it possesses. And this surplus it is which competition enables the landlord to appropriate.