Results Of Experiments At Rothamsted On The Growth Of Potatoes

Author : J. H. Gilbert
Publisher :
ISBN 13 : 9781332220755
Total Pages : 54 pages
Book Rating : 4.2/5 (27 download)

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Download or read book Results of Experiments at Rothamsted, on the Growth of Potatoes, for Twelve Years in Succession on the Same Land, Vol. 4 written by J. H. Gilbert and published by . This book was released on 2015-08-05 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Results of Experiments at Rothamsted, on the Growth of Potatoes, for Twelve Years in Succession on the Same Land, Vol. 4: A Lecture Delivered July 27, 1888, at the Royal Agricultural College, Cirencester My special object is to show the general requirements of the crop, both actually, and as compared with other crops, and the actual and comparative characters and composition of the product obtained. As in my lectures on other crops, I propose to draw my illustrations, mainly from the results of Field experiments on the growth of the Potato by different manures, for a number of years in succession on the same land, at Rothamsted, and from those of collateral investigations into the composition of the produce, made in the Rothamsted Laboratory. I shall, however, bring to my aid the results of other investigators, so far as the subject may require, and my limits as to time and space will permit. Produce Without Manure, And With Various Artificial Manures. First as to the average produce of Potatoes, per acre, per annum, without manure, and with different descriptions of manure. Table I. (p. 3), shows the results obtained without manure, and by six different descriptions of artificial manure; and Table II. (p. 7), shows the results without manure, and with farm-yard manure, either alone, or with other manures. In each case, the particulars given are, the average annual amounts obtained per acre, of good, of small, and of diseased Potatoes, the total amount of tubers, and the percentage of diseased in the total produce. In the case of the artificial manure series, these particulars are given, for the first four, the second four, the third four, and the total period of twelve years, of the continuous growth of the crop on the same land; and in the case of the farm-yard manure series, the results are given for six, six, and twelve years. The artificial manure series comprises the following conditions as to manuring: - 1.Without manure. 2. Superphosphate of lime alone. 3. A "mixed mineral manure," containing superphosphate, and salts of potash, soda, and magnesia. 4. Ammonium-salts alone, supplying 86 lbs. of nitrogen, per acre per annum. 5. Nitrate of soda alone, also supplying 86 lbs. of nitrogen, per acre per annum. 6. The ammonium-salts, and the "mixed mineral manure" together. 7. The nitrate of soda, and the mixed "mineral manure" together. It should be added, that the description of Potatoes grown during the first four years was the "Rock," but subsequently the "Champion." The last column but one of Table I. shows that, without manure, with ammonium salts alone, and with nitrate of soda alone, the average produce of tubers was less over each succeeding period of four years. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.