custom seems to have been that if they were eaten off by store sheep they went tithe free, if sheep were fattened on them the tithe was paid.[381] Clover, the other great novelty of the seventeenth century, was now generally sown with barley, oats, or rye grass, about 15 lb. per acre. This amount, sown on 2 acres of barley, would next year produce 2 loads worth about L5. The next crop stood for seed, which was cut in August, the hay being worth L9, and the seed out of it, 300 lb., was sold much of it for 16d. a lb., the sum realized in that year from the 2 acres being L30, without counting the aftermath. At this time most of the seed was still imported from Flanders.[382] Much of the common and waste land of England, not previously worth 6d. an acre, had been by 1732 vastly improved through sowing artificial grasses on it, so that various people had gained considerable estates.[383] Carrots were also now grown as a field crop in places, especially near London, two sorts being known, the yellow and red, used chiefly by farmers for feeding their hogs.[384] Of wheat the names were many, but there were apparently only seven distinct sorts, the Double-eared, Eggshell, Red or Kentish, Great-bearded, Pollard, Grey, and Flaxen or Lammas.[385] The growth of saffron had declined, though the English variety was the best in the world, according to Lawrence, and except in Cambridgeshire and about Saffron Walden it was little known. Though it was still some time before the days of Bakewell, increased attention was given to cattle-breeding; it was urged that a well-shaped bull be put to cows, one that had 'a broad and curled forehead, long horns, fleshy neck, and a belly long and large.'[386] Such in 1726 was the ideal type of the long-horns of the Midland and the north, but it was noticed that of late years and especially in the north the Dutch breed was much sought after, which had short horns and long necks, the breed with which the Collings were to work such wonders. The then great price of L20 had been given for a cow of this breed. Bradley, Professor of Botany at Cambridge, and a well-known writer on agriculture, divided the cattle of England into three sorts according to their colour: the black, white, and red.[387] The black, commonly the smallest, was the strongest for labour, chiefly found in mountainous countries; also bred chiefly in Cheshire, Yorkshire, Lancashire, and Derbyshire, sixty years before this, and in those days Cheshire cheese came from these cattle, apparently very much like the modern Welsh breed.[388] The white were much larger, and very common in Lincolnshire at the end of the seventeenth century. They gave more milk than the black sort but went dry sooner. They were also found in Suffolk and Surrey.