The improvements in the methods of farming already referred to as showing themselves earlier in the century became much more extensive. The raising of turnips and other root crops spread from experimental to ordinary farms so that a fallow year with no crop at all in the ground came to be almost unknown. Clover and artificial grasses for hay came to be raised generally, so that the supply of forage for the winter was abundant. New breeds of sheep and cattle were obtained by careful crossing and plentiful feeding, so that the average size was almost doubled, while the meat, and in some cases the wool, was improved in quality in even greater proportion. The names of such men as Jethro Tull, who introduced the "drill husbandry," Bakewell, the great improver of the breeds of cattle, and Arthur Young, the greatest agricultural observer and writer of the century, have become almost as familiar as those of Crompton, Arkwright, Watt, and other pioneers of the factory system. The general improvement in agricultural methods was due, not so much to new discoveries or inventions, as it was to the large amount of capital which was introduced into their practice. Expensive schemes of draining, marling, and other forms of fertilizing were carried out, long and careful investigations were entered upon, and managers of large farms were trained in special processes by landlords and farmers who had the command of large sums of money; and with the high prices prevalent they were abundantly remunerated for the outlay. Great numbers of "gentlemen farmers," such as Lord Townshend, the duke of Bedford, and George III himself, who wrote articles for the agricultural papers signed "Farmer George," were leaders in this agricultural progress. In 1793 a government Board of Agriculture was established, and through the whole latter part of the century numerous societies for the encouragement of scientific tillage and breeding were organized.