Skip to main content
ARS Home » Research » Publications at this Location » Publication #102436
Title: ANHYDROUS AMMONIA DISTRIBUTION DURING FIELD APPLICATION

Author
item HANNA, H MARK - IOWA STATE UNIVERSITY
item WHITE, MICHAEL - IOWA STATE UNIVERSITY
item Colvin, Thomas
item BAKER, J L - IOWA STATE UNIVERSITY

Submitted to: American Society of Agricultural Engineers Meetings Papers
Publication Type: Abstract Only
Publication Acceptance Date: 5/1/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Three Nh3 manifolds were tested for uniformity of application across an applicator. During field operation at 56 kg Nitrogen/ha (50 lb N/a) application rate, a Vertical-Dam manifold had less variability than a conventional manifold. At application rates of 112 and 168 kg N/ha (100 and 150 lb N/a) there was little difference in variability between the manifolds. The greatest amounts of ammonia exited from outlets across from the entry point and the least amounts of ammonia exited outlets with openings roughly parallel to incoming flow. Using a straight-entry pipe attached to the conventional manifold did not improve distribution over that of a 90 degree-elbow pipe entry at applications rates of 84 and 168 kg N/ha (75 and 150 lb N/a). A 25.4-mm (one-inch) pipe tee divided flow rather evenly when supplying ammonia to two manifolds. Average flow difference between exits of the pipe tee was 2.4% at two application rates.