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 …

Studies of root distribution have recently occupied an important place in the field of
ecological research. Much of the work, particularly in this country, has been concerned with …

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 …

AWIDESPREAD interest in forest soils has developed in Americadur-. ing the past decade.
Forest ecologists now attribute greater importance to the soil factor in forest production than …

Methods used to study root systems.. Root and rhizome systems.. Vertical distribution of
roots_ Root and rhizome systems.-Roots and rhizomes of the most common shrubs …

Very little is known of the root habits of forest trees. On theoretical grounds it is often
supposed that on dry soils the root system is deep; on moist soils that it is more shallow. In …

Strip—mine high walls and road cuts less than 2 years old were used to observe root
distribution in several soil and forest types common to north—central West Virginia. Seventy …

The investigation was carried out on 19 Spruce stands (aged 25-135 years) and 16 Pine
stands (10 100 years). Roots were collected from the different soil layers to a depth of 40 cm …

The present paper is one of a series on the wood struetture of conifers. Its scope is limited to
consideration of variability in the secondary xylem of roots of such native species as Thuja …

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 …