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


     

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 Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Web of Science (4)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Cabrera, M. L.
Right arrow Articles by Segars, W. I.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Cabrera, M. L.
Right arrow Articles by Segars, W. I.
Agricola
Right arrow Articles by Cabrera, M. L.
Right arrow Articles by Segars, W. I.
Related Collections
Right arrow Soil Methods/Instrumentation
Right arrow Nutrient Management

Design and Ammonia-Recovery Evaluation of a Wind Speed-Sensitive Chamber System

M. L. Cabrera*,a, D. E. Kissela, R. C. Davisb, N. P. Qafokua and W. I. Segarsa

a Crop & Soil Sciences, Univ. of Georgia, Athens, GA 30602
b Instrument Shop, Univ. of Georgia, Athens, GA 30602



View larger version (14K):

[in a new window]
  		Fig. 1. Diagram showing main system components.

 


View larger version (15K):

[in a new window]
  		Fig. 2. Steps in electronic valve adjustment. In Step 1, the datalogger calculates the average external wind speed based on anemometer readings. In Step 2, the datalogger outputs a proportional voltage based on the 5-min average external wind speed. In Step 3, the voltage output from the datalogger is fed to the electronic valve to adjust the wind speed inside the chamber head space.

 


View larger version (24K):

[in a new window]
  		Fig. 3. Side and bottom view of the acrylic lid. The slot labeled "open" on the left side of the bottom view allows outside air in. The square area labeled "open" in the center of the bottom view closes over the treated area so that the air drawn in through the slot can sweep the NH3 volatilized from the treated area. The slit on the right side of the lid (side view) generates a uniform sweep of the treated area.

 


View larger version (14K):

[in a new window]
  		Fig. 4. Relative NH3 loss as a function of wind speed through the chamber headspace.

 




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 2001 by the Soil Science Society of America.