Interrelations of Tillage and Weed Control for Soybean (<i>Glycine max</i>) Production

Webber, Charles L.; Kerr, Harold D.; Gebhardt, M. R.

doi:10.1017/s004317450007942x

Cited by 13 publications

(13 citation statements)

References 19 publications

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“…A reduction in soil ero sion and greater conservation of soil moisture are major agronomic benefits derived from NT (7). Stress tends to be less in NT compared to CT during periods of low rainfall, and is especially critical during soybean pod fill (11). Higher soybean yield has been reported in NT under low rainfall conditions compared to CT or reduced tillage (RT) 4 (10).…”

Section: Introductionmentioning

confidence: 99%

“…PRE applica tions of paraquat plus alachlor [2-chloro-Af-(2,6-diethylphenyl)-AKmethoxymethyl)acetamide] or metolachlor [2-chloro-AK2-ethyl-6-methy lphenyl)-AK2-methoxy-1methylethyl)acetamide] plus metribuzin [4-amino-6-(l,l-dimethylethyl)-3-(methylthio)-l,2,4-triazin-5(4//)-one] without or with a POST application of bentazon [3-( 1 -methylethyl)-( 1 #)-2,1,3-benzothiadiazin-4(3//)-one 2,2-dioxide] or naptalam {2-[(lnaphthalenylamino)carbonyl]benzoic acid} plus dinoseb [2-(l-methylpropyl)-4,6-dinitrophenol] resulted in poor weed control in NT due to the large weed size at herbicide application, inadequate rainfall, and the ab sence of cultivation (8). Where adequate rainfall oc curred and glyphosate plus alachlor plus linuron [AT-(3,4-dichlorophenyl)-A^methoxy-A^methylurea] were used, excellent control of the weeds was obtained in NT in 2 of 3 yr whether bentazon was used or not (11).…”

Section: Introductionmentioning

confidence: 99%

“…Lower yield in NT compared with CT has been at tributed to poor weed control (2,8). Although several researchers have found that soybean population in NT is less than, equal to, or greater than in CT, there was no difference in yield related to tillage (2,8,11).…”

Section: Introductionmentioning

confidence: 99%

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Weed Control and Yield are Equal in Conventional, Reduced-, and No-Tillage Soybean (Glycine max) After 11 Years

Kapuśta

Krausz

1993

Weed technol.

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Field experiments were conducted from 1979 to 1989 to determine the influence of conventional, reduced, and no-tillage systems and different herbicide combinations on weed species and population, weed control, and soybean injury, population, and yield. In no-till (NT) non-treated plots, there was an abrupt shift from horseweed as the dominant early spring emerging weed to gray goldenrod in 1985. Following its initial observation, gray goldenrod became the dominant species within 2 yr, with giant foxtail as the only other species observed in these plots. Giant foxtail was the dominant weed species from 1980 to 1989 in conventional till (CT) and reduced-till (RT) plots. There also was a shift in the frequency of occurrence and in density of several broadleaf weed species during the 11-yr study. Most herbicides provided excellent control of all weeds in all tillage systems, especially those that included POST herbicides. There was little difference between glyphosate and paraquat in controlling weeds present at the time of planting in NT. PRE herbicides caused 2 to 9% soybean injury with slightly greater injury occurring in CT and RT than in NT. The POST broadleaf herbicides did not significantly increase soybean injury. There were no differences in soybean population or yield among the herbicide treatments regardless of tillage. There also was no difference in soybean population or yield in NT compared with CT when averaged over all herbicide treatments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Weed Control and Yield are Equal in Conventional, Reduced-, and No-Tillage Soybean (Glycine max) After 11 Years

Kapuśta

Krausz

1993

Weed technol.

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“…The conservation com pliance provisions of the 1985 Food and Security Act will probably continue to promote increases in NT acres of both com (Zea mays) and soybeah. Lower fuel^labor, and machinery costs are the major economic advantages of NT crop production (4) and a reduction in soil erosion and greater conservation of soil moisture are the major agronomic benefits of NT (11,12,25,27).…”

Section: Introductionmentioning

confidence: 99%

Soybean (Glycine max) Tolerance to 2,4-D Ester Applied Preplant

1993

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Field studies were conducted in 1991 and 1992 to determine potential soybean injury due to 2,4-D ester at 560, 1120, and 1680 g ai/ha applied 0, 7, and 14 d before planting (DBP). Delayed emergence and increased injury of soybean were observed as 2,4-D rate increased and interval between application and planting decreased. Delay in emergence ranged from 0 to 67% and 0 to 50% in 1991 and 1992, respectively. Injury at 15 days after planting (DAP) combined over years ranged from 0 to 61%. Minimal (0 to 8%) delay in emergence and minimal (0 to 5%) injury at 15, 30, 45, and 60 DAP occurred when 2,4-D at 560 or 1120 g/ha was applied 7 or 14 DBP. No significant yield reduction occurred due to 2,4-D rate, application timing, or their interaction.

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“…Higher yields can often be ob tained with limited tillage, early-planted soybean (5, 7, 10). Soybean grown with conventional tillage may be delayed 3 wk or more by spring rains (10), during which time weed seedlings may become established (23). In efforts to avoid these delays, moist clay soils may be tilled before completely dry, and clodding then occurs.…”

mentioning

confidence: 99%

Tank-mix Combinations for Weed Control in Stale Seedbed Soybean (Glycine max)

Bruff

Shaw

1992

Weed technol.

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Field experiments were established in 1989 and 1990 on silty clay and sandy loam soils to evaluate selective herbicides in combination with non-selective weed control measures in conventional and stale seedbed soybean production. Metribuzin PRE followed by chlorimuron POST controlled sicklepod better with paraquat than with glyphosate. A POST application of imazaquin increased sicklepod and pitted morningglory control by imazaquin PRE alone in a stale seedbed or tillage program. Pitted morningglory control with imazaquin PRE was lower with tillage than with glyphosate or paraquat combinations in a stale seedbed program. All metribuzin plus chlorimuron PRE treatments, whether conventional tillage or stale seedbed, controlled pitted morningglory more than 75%. Hemp sesbania control was above 80% with all metribuzin followed by chlorimuron or metribuzin plus chlorimuron PRE combinations, and less than 70% with all treatments containing imazaquin. Selective herbicides increased yield in stale seedbed when glyphosate or paraquat was added. Imazaquin PRE, imazaquin PRE followed by imazaquin POST, and metribuzin PRE followed by chlorimuron POST tank mixed with glyphosate or paraquat in a stale seedbed program increased yield compared with the same treatments used with tillage.

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Interrelations of Tillage and Weed Control for Soybean (Glycine max) Production

Cited by 13 publications

References 19 publications

Weed Control and Yield are Equal in Conventional, Reduced-, and No-Tillage Soybean (Glycine max) After 11 Years

Weed Control and Yield are Equal in Conventional, Reduced-, and No-Tillage Soybean (Glycine max) After 11 Years

Soybean (Glycine max) Tolerance to 2,4-D Ester Applied Preplant

Tank-mix Combinations for Weed Control in Stale Seedbed Soybean (Glycine max)

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