About 1853[652] matters began to mend, chiefly owing to the great expansion in trade that followed the great gold discoveries in America and Australia. Then, came the Crimean War, with the closing of the Baltic to the export of Russian corn, wheat in 1855 averaging 74s. 8d., and in the next decade the American War crippled another competitor, the imports of wheat from the United States sinking from 16,140,000 cwt in 1862, to 635,000 cwt. in 1866. From 1853 until 1875 English agriculture prospered exceedingly, assisted largely by good seasons. Between 1854 and 1865 there were ten good harvests, and only two below the average. Prices of produce rose almost continuously, and the price and rent of land with them. The trade of the country was good, and the demand for the farmer's products steadily grew; the capital value of the land, live stock, and crops upon it, increased in this period by L445,000,000.[653] It appeared as if the abolition of the Corn Laws was not to have any great effect after all. Now at last the great body of farmers began to approach the standard set them long before by the more energetic and enterprising. Early maturity in finishing live stock for the market by scientific feeding probably added a fourth to their weight The produce of crops per acre grew, and drainage and improvements were carried out on all sides, the greatest improvement being made in the cultivation and management of strong lands, of which drainage was the foundation, and enabled the occupier to add swedes to his course of cropping.[654] It was in this period that Shorthorns, Herefords, and Devons attained a standard of excellence which has made them sought after by the whole world; and other breeds were perfected, the Sussex and Aberdeen Angus especially; while in sheep the improvement was perhaps even greater.[655] The improved Lincolns, Oxford Downs, Hampshire Downs, and Shropshires took their place as standard breeds at this period. In 1866, after many years of expectation and disappointment, agriculturists were furnished with statistics which are trustworthy for practical purpose, but are somewhat vitiated by the fact that the live stock census was taken on March 5, which obviously omitted a large number of young stock; so that those for 1867, when the census was taken on June 25, are better for purposes of comparison with those of subsequent years, when the census has been taken on June 4 or 5. Between 1867 and 1878 the cattle in England and Wales had increased from 4,013,564 to 4,642,641, though sheep had diminished from 22,025,498 to 21,369,810.[656] The total acreage under cultivation had increased from 25,451,526 acres to 27,164,326 acres in the same period.