After that time there was a great increase in the importation of food-stuffs from America. The increase of manufactures and the rapid growth of the population made the introduction of cheap food from abroad a necessity. In the youth of the empire the amount of corn grown in Germany was sufficient for the needs of its inhabitants; the amount consumed in 1899 exceeded the amount produced by about one-quarter of the total. At the same time the price, making allowance for the fluctuations owing to bad harvests, steadily decreased, notwithstanding the duty on corn. In twenty years the average price fell from about 235 to 135 marks the 1000 kilo. There was therefore a constant decrease in the income from land, and this took place at a time when the great growth of wealth among the industrial classes had made living more costly. The agriculturists of the north and east saw themselves and their class threatened with loss, and perhaps ruin; their discontent, which had long been growing, broke out into open fire during the discussion of the commercial treaties. As these would inevitably bring about a large increase in the importation of corn from Rumania and Russia, a great agitation was begun in agricultural circles, and the whole influence of the Conservative party was opposed to the treaties. This brought about a curious situation, the measures being only carried by the support of the Centre, the Radicals, and the Socialists, against the violent opposition of those classes, especially the landowners in Prussia, who had hitherto been the supporters of the government. In order to prevent the commercial treaty with Russia, a great agricultural league was founded in 1893, the _Bund der Landwirte_; some 7000 landowners joined it immediately. Two days later the Peasants' League, or _Deutsche Bauernbund_, which had been founded in 1885 and included some 44,000 members, chiefly from the smaller proprietors in Pomerania, Posen, Saxony and Thuringia, merged itself in the new league. This afterwards gained very great proportions. It became, with the Social Democrats, the most influential society which had been founded in Germany for defending the interests of a particular class; it soon numbered more than 200,000 members, including landed proprietors of all degrees. Under its influence a parliamentary union, the _Wirtschaftsvereinigung_, was founded to ensure proper consideration for agricultural affairs; it was joined by more than 100 members of the Reichstag; and the Conservative party fell more and more under the influence of the Agrarians.