Excerpt from The Rothamsted Memoirs on Agricultural Chemistry and Physiology, Vol. 7: Supplementary; Containing Reports of Field Experiments, Experiments on Vegetation, on the Feeding of Animals, &C., &C A large portion of the lecture on the conditions and results of growth of Leguminous Crops, which I gave' at the Colle e last year, was devoted to the illustration of the fact, that both t e scientific interest, and the practical value, of those crops, depended very much on the amount of nitrogen which they contain, and on the sources of their nitrogen; and especially on the great differences in these respects, between them and the representatives of the other families with which they are grown, either in alternation in our rotations, or in association in our meadows and pastures. I then discussed the bearing of existiu evidence on the question of the fixation of free nitrogen, and concludes by reference to some considerations and illustrations relating to the question of the sources of the nitrogen of crops generally. 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.