It has been denied that there can be any land in cultivation which pays no rent, because landlords (it is contended) would not allow their land to be occupied without payment. Inferior land, however, does not usually occupy, without interruption, many square miles of ground; it is dispersed here and there, with patches of better land intermixed, and the same person who rents the better land obtains along with it the inferior soils which alternate with it. He pays a rent, nominally for the whole farm, but calculated on the produce of those parts alone (however small a portion of the whole) which are capable of returning more than the common rate of profit. It is thus scientifically true that the remaining parts pay no rent. This point seems to need some illustration. Suppose that all the lands in a community are of five different grades of productiveness. When the price of agricultural produce was such that grades one, two, and three all came into cultivation, lands of poorer quality would not be cultivated. When a man rents a farm, he always gets land of varying degrees of fertility within its limits. Now, in determining what he ought to pay as rent, the farmer will agree to give that which will still leave him a profit on his working capital; if in his fields he finds land which would not enter into the question of rental, because it did not yield more than the profit on working it, after he rented the farm he would find it to his interest to cultivate it, simply because it yielded him a profit, and because he was not obliged to pay rent upon it; if required to pay rent for it, he would lose the ordinary rate of profit, would have no reason for cultivating it, of course, and would throw it out of cultivation. Moreover, suppose that lands down to grade three paid rent when A took the farm; now, if the price of produce rises slightly, grade four may pay something, but possibly not enough to warrant any rent going to a landlord. A will put capital on it for this return, but certainly not until the price warrants it; that is, not until the price will return him at least the cost of working the land, _plus_ the profit on his outlay. But the community needed this land, or the price would not have gone up to the point which makes possible its cultivation even for a profit, without rent. There must always be somewhere some land affected in just this way. § 4. —Or to the Capital employed in the least advantageous Circumstances.