Effects of Seeding Rate and Chemical Weed Control on Establishment and Subsequent Growth of Alfalfa (Medicago sativa L.) and Birdsfoot Trefoil (Lotus corniculatus L.)1

Wakefield, R. C.; Skaland, N.

doi:10.2134/agronj1965.00021962005700060009x

Cited by 24 publications

(29 citation statements)

References 2 publications

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“…1). In a similar experiment with non‐GR alfalfa, Wakefield and Skaland (1965) found that controlling weeds in newly seeded alfalfa with either EPTC or 2,4‐DB + dalapon [2,2‐dichloropropanoic acid] led to second year stands that had 27% more plants per m 2 than plots that did not have any weed control in Rhode Island. Similarly, Wilson and Burgener (2009) found that GR alfalfa treated with glyphosate or non‐GR alfalfa treated with one of several postemergent herbicides produced stands with approximately 26% more plants per m 2 than an untreated control in Nebraska.…”

Section: Resultsmentioning

confidence: 98%

Influence of Seeding Rate and Herbicide Treatments on Weed Control, Yield, and Quality of Spring‐Seeded Glyphosate‐Resistant Alfalfa

2010

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Field trials were conducted in 2005 and 2006 in central and southwest Missouri to investigate the eff ect of seeding rate and herbicide programs on weed control, forage quality, and yield within the year of establishment in spring seeded glyphosate-resistant (GR) alfalfa (Medicago sativa L.). In all experiments, EPTC (4.4 kg ha -1 ), 2,4-DB plus sethoxydim (1.1 plus 0.21 kg ha -1 ), imazamox (0.043 kg ha -1 ) and glyphosate (0.86 kg ae ha -1 ) were applied to GR alfalfa that was seeded at 4.5, 8.9, 13.5, and 18 kg ha -1 . Across all locations, the glyphosate application provided good control of weeds regardless of alfalfa seeding rate. When applied at the same timing, imazamox provided similar levels of annual broadleaf weed control as glyphosate, while 2, 4-DB plus sethoxydim provided similar levels of annual grass and broadleaf weed control as glyphosate. Neither glyphosate nor the conventional herbicide treatments reduced alfalfa stem density between the fi rst and last annual harvests, but 2, 4-DB plus sethoxydim resulted in the most visual injury to seedling alfalfa stands and lowered initial yields at all locations. In addition, alfalfa annual yields were similar or higher in the glyphosate treatment compared to the other herbicide programs. Harvested forage in the herbicide treatments generally had greater crude protein (CP) content than the untreated control forage. Application of glyphosate resulted in similar or higher forage CP content compared to conventional herbicide treatments. In vitro true digestibility of the harvested GR alfalfa ranged from 750 to 860 g kg -1 DM at all locations with few diff erences across herbicide treatments.

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Section: Resultsmentioning

confidence: 98%

Influence of Seeding Rate and Herbicide Treatments on Weed Control, Yield, and Quality of Spring‐Seeded Glyphosate‐Resistant Alfalfa

2010

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“…Dry matter yield in the first year of full-production was not significantly affected by sowing rate at the forest site and decreased slightly with increasing sowing rate at the grassland site. Previous studies also indicated that the influence of sowing rate on DM yield is less in the second year under both irrigated (Hansen & Krueger 1973;Cooper et al 1979) and dryland conditions (Wakefield & Skaland 1965;Hansen & Krueger 1973). Unpublished work at Kamloops (B. Hubbard, personal communication) did not include sowing year yields but indicated that first full-production year DM yield increased by 0-60 t ha" 1 when the sowing rate was increased from 2-8 to 11-2 kg ha" 1 .…”

Section: Yieldmentioning

confidence: 99%

Influence of sowing rate on dry matter yield, plant density and survival of lucerne (Medicago sativa) under dryland and irrigated conditions

Thompson

Stout

1996

J. Agric. Sci.

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Lucerne (Medicago sativa L.) sowing rates were evaluated to determine how environmental conditions affect seedling establishment and plant survival. Lucerne (cv. Peace) was sown during 1988 at rates ranging from 2-8 to 11-2 kg ha" 1 at one irrigated and two dryland sites (a forest and a mid-elevation grassland site) near Kamloops, British Columbia, Canada. Dry matter (DM) yield was measured for 3 years, and plants were counted to estimate seedling establishment and plant survival. Sowing year DM yield increased linearly with sowing rate at the irrigated and forest sites, but at the mid-elevation grassland site it decreased at sowing rates > 5-6 kg ha" 1 . In the first full-production year, DM yield levelled off at sowing rates > 8-4 kg ha"' at the irrigated site and was not affected by sowing rate at the forest site. At the grassland site, first full-production year DM yield decreased at sowing rates > 2-8 kg ha" 1 . In the second full-production year, there was a linear effect of sowing rate on DM yield at the irrigated site, but it did not affect DM yield at the two dryland sites. At all sites, the percentage of seedlings that survived to the end of the second growing season decreased curvilinearly as seedling density increased. Survival was less at the irrigated site than at the dryland sites. Higher sowing rates are required at irrigated sites than at dryland sites to obtain maximum yield or a required plant population density.i M T R n n i i P T i r i M Black Soil zone to 4 kg ha" 1 in the drier Brown Soil I1N1KUUUL11U1N z o n e ( A l b e r t a F o r a g e C r o p s Advisory Committee Pure stands of lucerne (Medicago sativa L.) are grown 1989). for hay production throughout the interior of British This report describes the effect of using sowing Columbia, Canada. The general recommendation to rates, ranging from 2-8 to 11-2 kg ha" 1 on lucerne DM producers in the region is to sow 11 kg ha" 1 under all yield, seedling establishment and plant survival to the conditions. The recommendation in Alberta, Canada autumn of the first full-production year. The trial was is to use a lower sowing rate under dryland than conducted to determine whether or not the optimum under irrigated conditions (Alberta Forage Crops sowing rate for lucerne is affected by environmental Advisory Committee 1989); however, there are few conditions. Plant densities were determined to dissources of published data to support this recom-cover how seedling establishment and plant survival mendation. No research has been conducted in influence the dynamics of a lucerne stand under interior British Columbia to support a lower sowing different environmental conditions. This sowing rate rate recommendation for dryland conditions. study was part of a larger study which included seed A lucerne study in South Dakota (Hansen & treatments (Thompson & Stout 1993). Since there Krueger 1973) reported that DM yield under ir-were no significant interactions between sowing rate rigation increased linearly in the sowing year as and seed treatment, and the aver...

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“…Some injury to birdsfoot trefoil by a 2,4-DP. dalapon treatment was reported by Peters (1964) and Wakefield and Skaland (1965), although the symptoms were not always evident. As a result, applied N on 2,4-DBdalapon-treated plots results in little to no increases in the DM yields of birdsfoot trefoil.…”

mentioning

confidence: 96%

Influence of Weed Control and N Fertilization at Establishment on Growth and Nodulation of Birdsfoot Trefoil

Kunelius¹

1974

Can. J. Plant Sci.

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Effects of Seeding Rate and Chemical Weed Control on Establishment and Subsequent Growth of Alfalfa (Medicago sativa L.) and Birdsfoot Trefoil (Lotus corniculatus L.)¹

Cited by 24 publications

References 2 publications

Influence of Seeding Rate and Herbicide Treatments on Weed Control, Yield, and Quality of Spring‐Seeded Glyphosate‐Resistant Alfalfa

Influence of Seeding Rate and Herbicide Treatments on Weed Control, Yield, and Quality of Spring‐Seeded Glyphosate‐Resistant Alfalfa

Influence of sowing rate on dry matter yield, plant density and survival of lucerne (Medicago sativa) under dryland and irrigated conditions

Influence of Weed Control and N Fertilization at Establishment on Growth and Nodulation of Birdsfoot Trefoil

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