Excerpt from Observations on the Nodulation of Leguminous Plants of the Southwest: Regional Bulletin No. 107, Plant Study Series No. 4, November 12, 1943 Leguminous plants have been considered to be of particular importance by the soil conservationist since they may flourish in badly eroded soils where nitron gen is a limiting factor for the growth of other plants. It has often not been realized, however, that nodulation and subsequent nitrogen-fixation cannot be taken for granted in the development of a leguminous plant. The proper species of bacteria must be present in the soil to produce root nodules or must be sup plied artificially by way of inoculation. The bacteria which produce nodules on different leguminous plants are not universally distributed in the soil. Tn addition to this, it is now well known that many of the bacteria which do produce nodules are not active nitrogen fixers and may in certain instances even be parasitic on the plant. There are some leguminous plants which do not produce nodules under any circumstances. Cursory examination of many legumi nous plants in the field, extending over several years, did not show root nodules to be present and abundant in many instances. Most nodules observed did not appear to be healthy and were thinly scattered over the root system. It was consequently thought desirable to Study the nodulation of leguminous plants native to the Southwest and of certain introduced Species which are being tested out in Soil Conservation Service nurseries for possible use in this area. 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.