Dissipation of Bromide and Metribuzin Affected by Tillage and Crop Residue Management in Subarctic Alaska
ABSTRACT. Prudent use of agricultural fertilizers and herbicides is paramount for sustaining or improving surface and ground water quality in Subarctic regions, but little information is available that documents the loss of chemicals from agricultural lands in the Subarctic. This study aimed to asce...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.596.746 2023-05-15T14:19:47+02:00 Dissipation of Bromide and Metribuzin Affected by Tillage and Crop Residue Management in Subarctic Alaska Brenton S. Sharratt Charles W. Knight The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.596.746 http://pubs.aina.ucalgary.ca/arctic/Arctic58-3-260.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.596.746 http://pubs.aina.ucalgary.ca/arctic/Arctic58-3-260.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic58-3-260.pdf text 2005 ftciteseerx 2016-01-08T13:46:19Z ABSTRACT. Prudent use of agricultural fertilizers and herbicides is paramount for sustaining or improving surface and ground water quality in Subarctic regions, but little information is available that documents the loss of chemicals from agricultural lands in the Subarctic. This study aimed to ascertain more clearly how time of application and land management practices affect the loss of bromide and metribuzin in a Subarctic soil. Potassium bromide (KBr), a surrogate for nitrate, and metribuzin, commonly used to control broadleaf weeds, were applied in the autumn of 1996 and the spring of 1997 to a silt loam that had been subjected to conventional tillage (CT), minimum tillage (disk once [DO]), and no tillage (NT) since 1983. Superimposed on the tillage treatments were the removal or retention of barley (Hordeum vulgare L.) stubble and loose straw. Loss of these chemicals was ascertained by sampling the soil profile at the time of heading of barley, before freeze-up of the soil in autumn, and after spring thaw until September 1998. Tillage and residue treatments did not influence the recovery of autumn-applied or spring-applied Br. However, recovery of Br diminished with time: about 30 % of the Br applied in autumn and 45 % of that applied in spring remained in the soil profile by September 1998. Tillage, but not residue, treatments influenced the recovery of metribuzin. Recovery of Text Arctic Subarctic Alaska Unknown |
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language |
English |
description |
ABSTRACT. Prudent use of agricultural fertilizers and herbicides is paramount for sustaining or improving surface and ground water quality in Subarctic regions, but little information is available that documents the loss of chemicals from agricultural lands in the Subarctic. This study aimed to ascertain more clearly how time of application and land management practices affect the loss of bromide and metribuzin in a Subarctic soil. Potassium bromide (KBr), a surrogate for nitrate, and metribuzin, commonly used to control broadleaf weeds, were applied in the autumn of 1996 and the spring of 1997 to a silt loam that had been subjected to conventional tillage (CT), minimum tillage (disk once [DO]), and no tillage (NT) since 1983. Superimposed on the tillage treatments were the removal or retention of barley (Hordeum vulgare L.) stubble and loose straw. Loss of these chemicals was ascertained by sampling the soil profile at the time of heading of barley, before freeze-up of the soil in autumn, and after spring thaw until September 1998. Tillage and residue treatments did not influence the recovery of autumn-applied or spring-applied Br. However, recovery of Br diminished with time: about 30 % of the Br applied in autumn and 45 % of that applied in spring remained in the soil profile by September 1998. Tillage, but not residue, treatments influenced the recovery of metribuzin. Recovery of |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Brenton S. Sharratt Charles W. Knight |
spellingShingle |
Brenton S. Sharratt Charles W. Knight Dissipation of Bromide and Metribuzin Affected by Tillage and Crop Residue Management in Subarctic Alaska |
author_facet |
Brenton S. Sharratt Charles W. Knight |
author_sort |
Brenton S. Sharratt |
title |
Dissipation of Bromide and Metribuzin Affected by Tillage and Crop Residue Management in Subarctic Alaska |
title_short |
Dissipation of Bromide and Metribuzin Affected by Tillage and Crop Residue Management in Subarctic Alaska |
title_full |
Dissipation of Bromide and Metribuzin Affected by Tillage and Crop Residue Management in Subarctic Alaska |
title_fullStr |
Dissipation of Bromide and Metribuzin Affected by Tillage and Crop Residue Management in Subarctic Alaska |
title_full_unstemmed |
Dissipation of Bromide and Metribuzin Affected by Tillage and Crop Residue Management in Subarctic Alaska |
title_sort |
dissipation of bromide and metribuzin affected by tillage and crop residue management in subarctic alaska |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.596.746 http://pubs.aina.ucalgary.ca/arctic/Arctic58-3-260.pdf |
genre |
Arctic Subarctic Alaska |
genre_facet |
Arctic Subarctic Alaska |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic58-3-260.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.596.746 http://pubs.aina.ucalgary.ca/arctic/Arctic58-3-260.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766291521081966592 |