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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
22/06/1998 |
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Data da última atualização: |
22/03/2022 |
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Autoria: |
YENISH, J. J.; DOLL, J. D.; BUHLER, D. D. |
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Afiliação: |
JOSEPH P. YENISH; JERRY D. DOLL; DOUGLAS D. BUHLER. |
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Título: |
Effects of tillage on vertical distribution and viability of weed seed in soil. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Weed Science, v. 40, n.3, p.433, 1992. |
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Idioma: |
Inglês |
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Conteúdo: |
The effect of different levels of tillage and weed management on population, distribution, and germination of weed seed was evaluated in three tillage systems at Arlington and Hancock, WI, in 1989 and 1990. Over 60% of all weed seed in the top 19 cm of soil were found in the top 1 cm in no-tillage at both sites. As depth increased, concentration of weed seed declined logarithmically in notillage. In chisel plowing, over 30% of seed were in the top 1 cm and seed concentration decreased linearly with depth. Moldboard plowing had uniform distribution of weed seed in the top 19 cm of soil. Preemergence metolachlor plus atrazine decreased weed seed population by 50% compared with no treatment over all tillage systems. One year of the herbicide treatment plus handweeding to assure weed-free conditions did not reduce seed numbers in chisel plowing or moldboard plowing compared to herbicide alone. Seed numbers with no-tillage and weed-free conditions decreased by 40% relative to herbicide alone. Common lambsquarters germination was 40% greater in moldboard plowing and chisel plowing compared with no-tillage. Gennination was highest in seed taken from 9 to 19 cm deep in moldboard plowing and from 0 to 9 cm deep in chisel plowing. Nomenclature: Atrazine, 6-chloro-N-ethyl-N-(1-methylethyl)-1,3,5-triazine-2,4-diamine; metolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-lmethylethyl) acetamide; common lambsquarters, Chenopodium album L . |
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Thesaurus Nal: |
Conservation tillage; Conventional tillage; Germination; Weeds. |
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Categoria do assunto: |
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Marc: |
LEADER 02004naa a2200193 a 4500
001 1700297
005 2022-03-22
008 1992 bl --- 0-- u #d
100 1 $aYENISH, J. J.
245 $aEffects of tillage on vertical distribution and viability of weed seed in soil.$h[electronic resource]
260 $c1992
520 $aThe effect of different levels of tillage and weed management on population, distribution, and germination of weed seed was evaluated in three tillage systems at Arlington and Hancock, WI, in 1989 and 1990. Over 60% of all weed seed in the top 19 cm of soil were found in the top 1 cm in no-tillage at both sites. As depth increased, concentration of weed seed declined logarithmically in notillage. In chisel plowing, over 30% of seed were in the top 1 cm and seed concentration decreased linearly with depth. Moldboard plowing had uniform distribution of weed seed in the top 19 cm of soil. Preemergence metolachlor plus atrazine decreased weed seed population by 50% compared with no treatment over all tillage systems. One year of the herbicide treatment plus handweeding to assure weed-free conditions did not reduce seed numbers in chisel plowing or moldboard plowing compared to herbicide alone. Seed numbers with no-tillage and weed-free conditions decreased by 40% relative to herbicide alone. Common lambsquarters germination was 40% greater in moldboard plowing and chisel plowing compared with no-tillage. Gennination was highest in seed taken from 9 to 19 cm deep in moldboard plowing and from 0 to 9 cm deep in chisel plowing. Nomenclature: Atrazine, 6-chloro-N-ethyl-N-(1-methylethyl)-1,3,5-triazine-2,4-diamine; metolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-lmethylethyl) acetamide; common lambsquarters, Chenopodium album L .
650 $aConservation tillage
650 $aConventional tillage
650 $aGermination
650 $aWeeds
700 1 $aDOLL, J. D.
700 1 $aBUHLER, D. D.
773 $tWeed Science$gv. 40, n.3, p.433, 1992.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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