A Biochemical Study Of Nitrogen In Certain Legumes Thesis Submitted In Partial Fulfillment Of The Requirements For The Degree Of Doctor Of Philosophy In Agronomy In The Graduate School Of The University Of Illinois 1912 PDF Download

Excerpt from The Influence of Certain Fertilizer Salts on the Growth and Nitrogen Content of Some Legumes: A Thesis Presented to the Faculty of the Graduate School of Cornell University for the Degree of Doctor of Philosophy Analyses of the roots of alfalfa showed an increase in the total nitrogen content due to the addition of phosphorus. The percentage of nitrogen in the first alfalfa cutting varied in inverse pro portion with the dry-weights, this being in agreement with numerous observa tions that rapid-gron plants contain a smaller percentage of nitrogen, en dry-weight basis, than slow-growing plants. But here, though the phosphorus treated plants grew faster than the controls, yet the total nitrogen was greater in this phosphorus-treated alfalfa. Analyses of the third cutting, which was deemed more representative of the normal mature growth of the crop, showed an entire agreement between the results, due to phosphorus, obtained from the whole crop and from the first cutting, by way of increased total nitrogen and increased dry weight. But the third cutting showed an increase in the percentage of nitrogen in the tops for phosphorus treatment. Phosphorus caused a greater total of nitro gen and a greater percentage of nitrogen to be stored in the tops than did nitrogen treatment of the soil. The data for the inoculated and the uninocu lated series agreed throughout. Consequently, the author concluded that the difference in the percentage of nitrogen must unquestionably be considered as resulting from phosphorus treatment. The results obtained by the use of phosphorus were (a) increased growth, and (b) greater efficiency in fixing and storing nitrogen. The nodule bacteria apparently had not only supplied more nitrogen to those plants that received heavier treatments of phosphorus, but had also stored a larger. Percentage of nitrogen in their tops. 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.