Book Description

Excerpt from The Fixation of Atmospheric Nitrogen: A Communication Made to the Cairo Scientific Society, January 3, 1919 While there is no doubt that the final test of any fertilizer must always be made on the large scale in the field, still there is always a great deal of information to be obtained from experiments in pots, if these are carried out with sufficient care. In this country, in summer, one's choice of crops which are at all suitable for cultivation under these conditions is extremely limited, and indeed maize appears to be the only plant available. Owing to its very rapid growth it is evident that only those fertilizers which are of almost immediate availability will prove of value. This fact must be borne in mind when considering the results of the experiment now to be described. In comparing fertilizers which provide the same ingredient two courses are open. Either equal money values of the various manures may be applied and the increases in yield over a control plot compared, or equal weights of the particular constituent (e. G. Nitrogen) may be employed and the relative efficiency calculated from the results by comparing the increases brought about by the different manures with that obtained by some standard material, in this case nitrate of soda. In the present instance the latter course was adopted. 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.