JEQ
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 27 October 2006
Published in J Environ Qual 35:2026-2042 (2006)
DOI: 10.2134/jeq2005.0249
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Abstract Freely available
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Youssef, M. A.
Right arrow Articles by Gilliam, J. W.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Youssef, M. A.
Right arrow Articles by Gilliam, J. W.
Agricola
Right arrow Articles by Youssef, M. A.
Right arrow Articles by Gilliam, J. W.
Related Collections
Right arrow Pesticides
Right arrow Agricultural Pesticides

Field Evaluation of a Model for Predicting Nitrogen Losses from Drained Lands

Mohamed A. Youssefa,*, R. Wayne Skaggsa, George M. Chescheira and J. Wendell Gilliamb

a Department of Biological and Agricultural Engineering., North Carolina State University, Raleigh, NC 27695
b Department of Soil Science, North Carolina State University, Raleigh, NC 27695


Figure 1
View larger version (20K):

[in a new window]
  		Fig. 1. The N cycle as modeled in DRAINMOD-N II.

 

Figure 2
View larger version (17K):

[in a new window]
  		Fig. 2. The carbon cycle as modeled in DRAINMOD-N II (MET = metabolic; STR = structural; LGN = lignin; CEL = cellulose; MCR = microbe; SURF = surface; ACT = active; SLO = slow; PAS = passive).

 

Figure 3
View larger version (38K):

[in a new window]
  		Fig. 3. General layout of the research site at the Tidewater Experiment Stn., Plymouth, NC.

 

Figure 4
View larger version (14K):

[in a new window]
  		Fig. 4. Nitrogen uptake functions for crops grown on the TES site from 1992 through 1997.

 

Figure 5
View larger version (28K):

[in a new window]
  		Fig. 5. Observed and simulated water table depths for plot 3 from 1992 through 1994.

 

Figure 6
View larger version (29K):

[in a new window]
  		Fig. 6. Observed and simulated water table depths for plot 4 from 1992 through 1994.

 

Figure 7
View larger version (26K):

[in a new window]
  		Fig. 7. Observed and simulated subsurface drainage for plot 3 from 1992 through 1994.

 

Figure 8
View larger version (25K):

[in a new window]
  		Fig. 8. Observed and simulated subsurface drainage for plot 4 from 1992 through 1994.

 

Figure 9
View larger version (23K):

[in a new window]
  		Fig. 9. Scatter diagram comparing observed and predicted monthly NO3–N losses with drain flow for plots 2 through 5 from 1992 through 1997.

 

Figure 10
View larger version (23K):

[in a new window]
  		Fig. 10. Observed and predicted NO3–N loss via subsurface drainage for plot 3 from 1992 through 1994.

 

Figure 11
View larger version (23K):

[in a new window]
  		Fig. 11. Observed and predicted NO3–N loss via subsurface drainage for plot 4 from 1992 through 1994.

 

Figure 12
View larger version (29K):

[in a new window]
  		Fig. 12. Observed and predicted cumulative rates of subsurface drainage and NO3–N leaching loss for experimental plots 2 through 5 from 1992 through 1997.

 




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Vadose Zone Journal Journal of Plant Registrations
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Copyright © 2006 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.