Chapter XXVI: The Rothamsted Experiments

Nature of experiments on crops and manures 561
Soil of Rothamsted 561
Table I. List of Rothamsted field experiments 562
Wheat experiments--
Unmanured plots 562
Wheat grown continuously on same land (unmanured) 562
Table II. Results of first eight years 562
Table III. Results of subsequent forty years 562
Table IV. Wheat grown continuously with farmyard
manure (14 tons per annum) 564

Table V. Wheat grown continuously with artificial manures 565 Table VI. Experiments on the growth of barley, forty years, 1852-91 566 Table VII. Experiments on the growth of oats, 1869-78 567 Table VIII. Experiments on root crops--Swedish turnips 568, 569 Table IX. Experiments on mangel-wurzel 568, 569 Table X. Experiments with different manures on permanent meadow-land, thirty-six years, 1856-91 570 Table XI. Experiments on the growth of potatoes--average for five seasons, 1876-80 571 Table XII. Experiments on growth of potatoes (continued)-- average for twelve seasons, 1881-92 572

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INDEX 573