Data on the depth and spread of 31 species of trees and shrubs were collected at Fargo,
North Dakota. The average rainfall in this area is 22.34", but for the past 15 years it has been …

soils because of the intimate asso-ciation between the soil and the roots of the trees, and the
effect of soil properties on the absorption of water and nutrients. We know that certain …

During recent years considerable attention has been directed to the study of the root
systems of various agricultural plants. These studies have not been prompted entirely by …

1. Half shade favored the growth of seedlings of black walnut, buckeye, red oak, shellbark
hickory, and hard maple but retarded growth of honey locust, boxelder, and sycamore. 2 …

A knowledge of root distribution and root competition under different natural conditions is not
only of much scientific value, but it also finds practical application in a better understanding …

1. A typical square meter of vegetation was selected in the upland, Andropogon scoparius
prairie on Lancaster loam soil, near Lincoln, Nebraska, and another in the lowland, A …

In connection with studies of the vegetation of the Illinoian till plain, 1 certain peculiarities of
root systems were observed which appear to be due to local environmental conditions …

METHODS The methods used in this study were the same as those followed by Weaver and
his co-workers. The earth from around the roots was carefully and painstakingly removed by …

The region at Albuquerque differs from that of Tucson in having about two-thirds as much
rainfall and much lower winter temperatures. The soil of the mesa is fluviatile in origin and …

Knowledge of the soil as a medium for the growth of roots has increased very greatly in the
past three decades. Earlier studies on the root depth and distribution of native Midwestern …