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It is with the produce of improved and cultivated land only that

cattle can be fed in the stable; because, to collect the scanty

and scattered produce of waste and unimproved lands, would

require too much labour, and be too expensive. If the price of

the cattle, therefore, is not sufficient to pay for the produce

of improved and cultivated land, when they are allowed to pasture

it, that price will be still less sufficient to pay for that

produce, when it must be collected with a good deal of additional

labour, and brought into the stable to them. In these

circumstances, therefore, no more cattle can with profit be fed

in the stable than what are necessary for tillage. But these can

never afford manure enough for keeping constantly in good

condition all the lands which they are capable of cultivating.