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Prometryn Movement Across and Through the Soil

Published online by Cambridge University Press:  12 June 2017

F. L. Baldwin ,
P. W. Santelmann  and
J. M. Davidson
F. L. Baldwin
Affiliation:
Dep. of Agron., Oklahoma State University. Currently Ext. Agron., Arkansas Agr. Ext. Ser., Little Rock, AR 72203
P. W. Santelmann
Affiliation:
Dep. of Agron., Oklahoma State University, Stillwater, OK 74074
J. M. Davidson
Affiliation:
Dep. of Soil Sci., University of Florida, Gainesville, FL 32611
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Abstract

Specially constructed runoff plots were used to study the effect of simulated rainfall intensity, antecedent soil moisture, and subsequent rainfall on prometryn [2,4-bis(isopropylamino)-6-methylthio-s-triazine] movement across and through a field soil with a 1% slope. The first cm (45.4 L) of runoff was collected and subdivided. The initial 3.8 L of runoff water generally contained a higher concentration of prometryn than did a composite from the next 41.6 L. The sediment contained a higher prometryn concentration than did the runoff water. However, due to the greater volume of water lost compared to sediment, over 90% of the prometryn lost was in the water fraction. When prometryn was applied to a dry soil and rainfall simulated, runoff losses of prometryn were 0.5% or less of the total amount initially applied. The first runoff producing simulated rainfall caused the largest prometryn losses, but prometryn could not be detected in the runoff 1 month subsequent to application. Prometryn was never detected at soil depths greater than 5 cm. Prometryn runoff was greater from plots in which the soil was wet at the time of application.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 4 , July 1975 , pp. 285 - 288
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

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