The Distribution And Activities Of Bacteria In Soils Of The Arid Region PDF Download

Excerpt from The Distribution and Activities of Bacteria in Soils of the Arid Regions Soil No. 2. Silty alluvial loam, from Davis, California. The samples used were obtained from between some fig trees at the University Farm. This soil is practically uniform in color from the first foot to the twelfth and only becomes slightly different in texture below the fifth foot, becoming gradually coarser and sandier as we descend to the lower layers. It is well supplied with potash, phosphoric acid, and lime and has, for a soil of the arid region, a normal content of humus. Soil N o. 3. Sandy alluvial loam, from Davis, California. Samples were taken from a wheat field at the University Farm, only to a depth of ten feet. This soil is well supplied with phosphoric acid, potash and lime, but rather poor in humus and nitrogen. The sand is of a coarse nature and becomes rapidly coarser, descending from the first foot down to the twelfth, where it is found as very coarse sand. 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.