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Filtering by: Creator Messersmith, James David Degree Name Doctor of Philosophy (Ph.D.)

Comparative gibberellin relationships in tall and dwarf peas (Pisum sativum L.)

Creator:

Anderson, James David

Abstract:

Experiments were performed to determine whether a direct correlation exists between the growth rates of tall and dwarf peas grown either in the light or in the dark and endogenous gibberellin (GA) content. Three separate but related experimental approaches were utilized: (1) the determination of possible qualitative and /or quantitative...

Resource Type:

Dissertation

Full Text:

peas (Pisum sativum L.) AN ABSTRACT OF THE THESIS OF JAMES DAVID ANDERSON in for the PH, D
Managing the spatial configuration of land : the economics of land use and habitat fragmentation

Creator:

Lewis, David James

Abstract:

Habitat fragmentation has been widely studied in the biological literature and is considered a primary threat to biodiversity. However, there has been little research on land-use policies to reduce fragmentation. This dissertation focuses on two major research issues related to fragmentation policies. First, I develop an analytical model to analyze...

Resource Type:

Dissertation

Full Text:

David J. Lewis for the degree of Doctor of Philosophy in
Sorption of NH₃ in a dry system in relation to the chemical properties of clays and soils

Creator:

James, D. W. (David W.), 1929-

Abstract:

The physico-chemical reactions of ammonia in soils and clays have many practical and theoretical implications. On the one hand, large quantities of anhydrous ammonia are used annually in agriculture for fertilizer; the dry gas is applied directly to the soil by simply injecting it below the ground surface. On the...

Resource Type:

Dissertation

Full Text:

PROPERTIES OF CLAYS AND SOILS by DAVID WINSTON JAMES A THESIS submitted to OREGON STATE UNIVERSITY