The Resource Stabilized nitrogen management for soft red winter wheat production in Missouri, by Fanson Majani Kidwaro

Stabilized nitrogen management for soft red winter wheat production in Missouri, by Fanson Majani Kidwaro

Label
Stabilized nitrogen management for soft red winter wheat production in Missouri
Title
Stabilized nitrogen management for soft red winter wheat production in Missouri
Statement of responsibility
by Fanson Majani Kidwaro
Title variation
Stabilized nitrogen management for winter wheat
Creator
Subject
Language
eng
Summary
The utilization of nitrapyrin in nitrogen (N) management may be an important tool for increasing soft red winter wheat yields in Missouri. The objectives of this study were to: (1) Determine the duration of ammonium retention in the soil profile during fall and winter growth periods from anhydrous ammonia fertilizer treated with nitrapyrin(2-chloro-6-(trichloromethyl) pyridine); (2) Evaluate fall and split applications of anhydrous ammonia with or without nitrapyrin for soft red winter wheat in Missouri; and (3) Relate crop yield to NH$\sb4\sp{+}$/NO$\sb3\sp{-}$ soil ratios. Anhydrous ammonia was applied with and without nitrapyrin on a Mexico silt loam (fine montmorillonitic, udolic ochraqualf). Three days after application of anhydrous ammonia, soil samples were collected from the injection zone (IZ) and the surrounding profile up to 8 cm from the IZ. Higher levels of ammonium (NH$\sb4\sp{+}$) were retained in the soil profile in plots treated with nitrapyrin during both 1991-92 and 1992-93 sampling periods. Overall nitrate (NO$\sb3\sp{-}$) levels in the soil profile increased during the first three weeks of the study, but then decreased following wheat establishment and remained relatively low during both 1991-92 and 1992-93 sampling periods. There was a negative relationship between declining NH$\sb4\sp{+}$ levels and cumulative heat units in treatments with and without nitrapyrin during both growing periods. Nitrapyrin improved NH$\sb4\sp{+}$ retention in the soil profile during fall and winter sampling periods. There was no yield response to improved NH$\sb4\sp{+}$ retention by nitrapyrin across sites during the three year study. Yield components and harvest index (HI) were not influenced by split N treatments with or without nitrapyrin. Nitrapyrin did not increase nitrogen use efficiency (NUE), however, NUE increased with increasing spring N application. Lack of yield response to nitrapyrin clearly indicates that nitrapyrin is not an important tool to be incorporated into the N management for soft red winter wheat production in Missouri
Additional physical form
Also available on the Internet.
Cataloging source
MUU
http://library.link/vocab/creatorDate
1964-
http://library.link/vocab/creatorName
Kidwaro, Fanson Majani
Degree
Ph. D.
Dissertation year
1996.
Government publication
government publication of a state province territory dependency etc
Granting institution
University of Missouri-Columbia
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
bibliography
http://library.link/vocab/subjectName
  • Soft red winter wheat
  • Agricultural productivity
  • Soils
  • Soils
Target audience
specialized
Label
Stabilized nitrogen management for soft red winter wheat production in Missouri, by Fanson Majani Kidwaro
Instantiates
Publication
Note
  • Typescript
  • Vita
Bibliography note
Includes bibliographical references (leaves 84-87)
Carrier category
online resource
Carrier category code
cr
Carrier MARC source
rdacarrier
Color
not applicable
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Control code
36299718
Dimensions
29 cm
Extent
xi, 99 leaves
Media category
computer
Media MARC source
rdamedia
Media type code
c
Other physical details
illustrations
Specific material designation
remote
Label
Stabilized nitrogen management for soft red winter wheat production in Missouri, by Fanson Majani Kidwaro
Publication
Note
  • Typescript
  • Vita
Bibliography note
Includes bibliographical references (leaves 84-87)
Carrier category
online resource
Carrier category code
cr
Carrier MARC source
rdacarrier
Color
not applicable
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Control code
36299718
Dimensions
29 cm
Extent
xi, 99 leaves
Media category
computer
Media MARC source
rdamedia
Media type code
c
Other physical details
illustrations
Specific material designation
remote

Library Locations

    • Ellis LibraryBorrow it
      1020 Lowry Street, Columbia, MO, 65201, US
      38.944491 -92.326012
    • University of Missouri Libraries DepositoryBorrow it
      2908 Lemone Blvd, Columbia, MO, 65211, US
      38.919360 -92.291620
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