Document Type

Thesis - Open Access

Award Date

1957

Degree Name

Master of Science (MS)

Department

Agronomy

Abstract

The use of commercial fertilizers has become an accepted practice in American agriculture. Among nitrogenous fertilizers, urea possesses characteristics which make it suitable for use in mixed gods and desirable for direct application to soils requiring only nitrogen. Urea is a concentrated fertilizer usually containing about 45% nitrogen. This high proportion of nitrogen is higher than for any other commercial solid nitrogenous fertilizer material. Often urea is cheaper than other forms of nitrogen per pound of plant food when transportation is an appreciable part of the total fertilizer cost. Although urea may appear to be an ideal nitrogen carrier, it has been credited with reducing germination of various crop

seeds when applied at time of planting. This damage to stands has been observed in South Dakota under varying conditions and in different soils. The objective of this study was to observe the effect of urea on germinating wheat and attempt to determine what specific agent or condition causes poor seed germination when urea is applied as fertilizer. Germination trials were conducted under low temperature conditions and in the field. Laboratory measurements included conductivity, pH, nitrites and ammonia.

Library of Congress Subject Headings

Wheat -- South Dakota
Fertilizers
Manures

Description

Includes bibliographical references (pages 28-29)

Format

application/pdf

Number of Pages

34

Publisher

South Dakota State University

Rights

No Copyright - Non-Commercial Use Only
http://rightsstatements.org/vocab/NoC-NC/1.0/

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