The Romans did not have the fight against sour land which is the heritage of the modern farmer after years of continuous application to his land of phosphoric and sulphuric acid in the form of mineral fertilizers. What sour land the Romans had they corrected with humus making barnyard manure, or the rich compost which Cato and Columella recommend. They had, however, a test for sourness of land which is still practised even where the convenient litmus paper is available. Virgil (_Georgic_ II, 241) gives the formula: "Fill a basket with soil, and strain fresh water through it. The taste of water strained through sour soil will twist awry the taster's face."] [Footnote 63: This sounds like the boast of the modern proprietor of an old blue grass sod in Northern Virginia or Kentucky. On the general question of pasture vs. arable land, cf. Hartlib's _Legacie_: "It is a misfortune that pasture lands are not more improved. England abounds in pasturage more than any other country, and is, therefore, richer. In France, acre for acre, the land is not comparable to ours: and, therefore, Fortescue, chancellor to Henry VI, observes that we get more in England by standing still (alluding to our meadows) than the French do by working (that is, cultivating their vineyards and corn lands)." We may permit Montesquieu (_Esprit des Lois_ II, 23, 14) to voice the French side of this question. "Les pais de pâturage sont pen peuplês. Les terres à bled occupent plus d'hommes et les vignobles infiniment d'avantage. En Angleterre on s'est souvent plaint que l'augmentation des pâturage diminuoit les habitans." In the introduction to his Book Two (_post_, p. 179) Varro states the sound conclusion, that the two kinds of husbandry should be combined on the same land. Sir Anthony Fitzherbert knew this: "An housbande can not well thryue by his corne without he haue other cattell, nor by his cattell without corne. For els he shall be a byer, a borrower or a beggar."] [Footnote 64: This is the explanation of why Aesop's fox found the grapes to be sour which grew on a trellis, for he had expected to find them of easy access on the ground. Aesop was a Phrygian, and, while Bentley has proved that Aesop never wrote the existing fables which go by that name, yet it is recognized that they are of Oriental origin and it is evident that that of the Fox and the Grapes came out of Asia, where, as Varro says, the grapes were usually allowed to grow on the ground.] [Footnote 65: One is tempted to include here Pliny's observations upon the tests of good soil if only for the sake of his description of one of the sweetest sensations of the farmer every where, the aroma of new ploughed fertile land:--