EFFECT OF ROW WIDTH AND POPULATION ON SOYBEAN YIELD IN SOUTHWESTERN ONTARIO

1984 ◽  
Vol 64 (1) ◽  
pp. 9-15 ◽  
Author(s):  
A. D. McLAREN ◽  
G. R. ABLETT ◽  
J. C. SCHLEIHAUF
Keyword(s):  
Glycine Max ◽  
Plant Height ◽  
Yield Response ◽  
Row Spacing ◽  
Seeding Rate ◽  
Soybean Yield ◽  
Row Width ◽  
Glycine Max L

The effect of seeding rate (seeds per hectare) and row width (distance between rows) was examined for various adapted soybean (Glycine max (L.) Merr.) cultivars in southwestern Ontario. Maple Arrow, Harosoy 63 and Harcor cultivars were grown in 18-, 35-, 53-, 71-, and 89-cm row widths seeded at 198 000, 395 000, and 593 000 seeds/ha during 1978 and 1979. The greatest yields were associated with the two narrowest row widths and the two highest seeding rates. Plant height, lodging, and bottom pod height varied mainly with seeding rate and cultivar. In another 2-yr study (1980 and 1981) Maple Arrow, Evans, S1346, Hodgson, A2575, and Harcor were grown at four row widths (18, 35, 53, and 71 cm) and two seeding rates (395 000 and 593 000 seeds/ha). A significant cultivar × row width interaction for yield occurred with Maple Arrow and Harcor showing the greatest yield response. Although a small seeding rate × cultivar interaction occurred, generally, seeding rates between 395 000 and 593 000 seeds/ha were adequate for all cultivars and all row widths.Key words: Glycine max (L.) Merr., seeding rate, row spacing, lodging, yield

scholarly journals THE EFFECTS OF SEEDING RATE AND ROW SPACING ON THE PHOTOSYNTHETIC ACTIVITY OF SOYBEAN (GLYCINE MAX (L.) MERR.)

2021 ◽  
Vol 19 (5) ◽  
pp. 4169-4184
Author(s):  
О. MIKHEEVA ◽  
I. KLYMENKO ◽  
V. MIKHEEV ◽  
L. GOLOVAN ◽  
O. DYCHENKO ◽  
...  
Keyword(s):  
Glycine Max ◽  
Photosynthetic Activity ◽  
Row Spacing ◽  
Seeding Rate ◽  
Glycine Max L

Row spacing is more important than seeding rate for increasing Rhodes grass (Chloris gayana) control and grain yield in soybean (Glycine max)

2017 ◽  
Vol 68 (7) ◽  
pp. 620 ◽  
Author(s):  
Ghulam Rasool ◽  
Gulshan Mahajan ◽  
Rajpaul Yadav ◽  
Zarka Hanif ◽  
Bhagirath Singh Chauhan
Keyword(s):  
Glycine Max ◽  
Grain Yield ◽  
Weed Management ◽  
Management Program ◽  
Row Spacing ◽  
Seeding Rate ◽  
Rhodes Grass ◽  
Soybean Yield ◽  
Chloris Gayana ◽  
Grass Biomass

In Australia, soybean (Glycine max (L.) Merr.) is planted at a low density in wide rows, and weeds substantially reduce yield because of opportunities for their growth in the wide rows. Field studies were conducted over 2 years at the University of Queensland farm, Gatton, Australia, to assess the effect of row spacing and seeding rate on the competitiveness of soybeans with a model weed, Rhodes grass (Chloris gayana Kunth). The experiment was conducted in a split-split plot design, replicated three times. Main plots comprised two seeding rates (40 and 80 kg ha–1), subplots two row spacings (25 and 75 cm), and sub-subplots four Rhodes grass infestation periods (weedy from planting to maturity, weedy from 3 weeks after planting (WAP) to maturity, weedy from 6 WAP to maturity, and weed-free from planting to maturity). The results showed that seed rate did not influence Rhodes grass biomass or soybean yield. Soybean yield was greater and Rhodes grass biomass was less in the 25-cm rows than the 75-cm rows. For the 25-cm rows, Rhodes grass biomass in the plots infested beyond 3 WAP was 81–89% less than in the season-long weedy plots, whereas for the wider row crop, this reduction was only 60–75%. For the 25-cm rows, soybean yield in the plots infested with Rhodes grass beyond 3 WAP was 30–36% less than under weed-free condition. However, for the 75-cm rows, this reduction was 56–65%. The results suggest that planting soybean in wider rows caused greater reduction in yield and required an earlier weed management program than planting in narrow rows. The study also suggested that narrowing row spacing was more important than increasing seeding rates for improving weed control and soybean grain yield.

THE EFFECT OF DIFFERENT ROW SPACINGS AND PLANT ARRANGEMENTS ON SOYBEANS

1980 ◽  
Vol 60 (1) ◽  
pp. 227-231 ◽  
Author(s):  
OSEI SAFO-KANTANKA ◽  
NORMAN C. LAWSON
Keyword(s):  
Glycine Max ◽  
Seed Yield ◽  
Significant Response ◽  
Row Spacing ◽  
Row Width ◽  
Plant Densities ◽  
Glycine Max L ◽  
Significant Yield ◽  
Short Season

Two short-season soybean (Glycine max (L.) Merrill) cultivars, Altona and Clay, were tested in narrow rows (10, 15, 20 and 30 cm), and at four rectangularities (1:1, 1:2, 1:3, and 1:4) giving plant densities that ranged from 11 000 to 4 000 000 plants per hectare. Significant yield differences were demonstrated by narrowing row width, but not by changing rectangularity. In a second experiment, the same cultivars were grown in rows 15, 30, 45, and 60 cm apart, but with the density held constant at 670 000 plants/ha. This resulted in respective rectangularities of 1:1.5, 1:6, 1:13.6 and 1:24. Neither seed yield nor its components showed any significant response to row spacing in the second experiment.

YIELD RESPONSE OF SPRING BARLEY TO ROW SPACING AND SEEDING RATE

1971 ◽  
Vol 51 (6) ◽  
pp. 527-533 ◽  
Author(s):  
R. C. FINLAY ◽  
E. REINBERGS ◽  
T. B. DAYNARD
Keyword(s):  
Spring Barley ◽  
Relative Size ◽  
Morphological Type ◽  
Cultivar Differences ◽  
Yield Response ◽  
Row Spacing ◽  
Seeding Rate ◽  
Hordeum Vulgare L ◽  
Testing Procedures ◽  
Row Width

Four cultivars of Hordeum vulgare L. were grown in 1967 at three seeding rates (54, 108, and 161 kg/ha) in six row spacings (11-, 18-, 23-, and 31-cm rows, and 11- and 18-cm cross-planted rows). The study was expanded in 1968 to include an additional cultivar of Hordeum distichum L. Grain yield was unaffected by seeding rate in either year. Narrow row spacing resulted in increased grain yields in 1968, when mean yields were high, but not in 1967 when yields were below normal. In both years, decreased row width resulted in increased numbers of spikes per m2 of ground area, and decreased numbers of grains per spike. A significant cultivar × row spacing interaction for yield was observed in 1968, but not in 1967. Statistical analysis revealed this interaction to be closely related to cultivar yield levels; that is, high yielding cultivars displayed a greater response to narrowing row spacing than did their lower-yielding counterparts. No consistent relationship was observed between cultivar yield differences, or the cultivar × row spacing interaction for yield, and cultivar differences in morphological type (leaf disposition, plant height). Furthermore, cultivar differences in yield were not related to the relative size of the various yield components (1000-grain weight, grains per spike, and spikes per m2). Although a cultivar × row spacing interaction for yield was observed, results suggest that, under Ontario conditions, this interaction does not represent a serious drawback to present cultivar testing procedures whereby cultivars are evaluated for yield at a single row width spacing.

Row Spacing and Seeding Rate Effects on Eastern Black Nightshade (Solanum Ptycanthum) and Soybean

2007 ◽  
Vol 21 (1) ◽  
pp. 124-130 ◽  
Author(s):  
Adrienne M. Rich ◽  
Karen A. Renner
Keyword(s):  
Dry Weight ◽  
Field Studies ◽  
Production Costs ◽  
Row Spacing ◽  
Seeding Rate ◽  
Soybean Yield ◽  
Eastern Black Nightshade ◽  
Solanum Ptycanthum ◽  
Black Nightshade ◽  
Rate Effects

Reducing seeding rates in 19- or 76-cm row soybean below the optimum rate may reduce soybean competitiveness with weeds, and indirectly increase production costs to the grower. Field studies in 2001 and 2002 evaluated the effect of soybean seeding rate and row spacing on the emergence, growth, and competitiveness of eastern black nightshade (EBN) in soybean. EBN emergence ceased within 45 d after planting (DAP), and was similar across soybean seeding rates and row spacing. EBN control by glyphosate was not affected by soybean population or row spacing. Soybean planted in 19-cm rows was more competitive with EBN, regardless of seeding rate. Increasing the soybean seeding rate in 76-cm rows from 185,000 seeds/ha to 432,000 seeds/ha reduced EBN dry weight threefold at East Lansing and nearly twofold at Clarksville in 2002. There was no increase in EBN density or dry weight in 19-cm row soybean planted at 308,000 seeds/ha compared with 556,000 seeds/ha, whereas a seeding rate of 432,000 seeds/ha in 76-cm row soybean did not suppress EBN dry weight or increase soybean yield in the presence of EBN compared with a seeding rate of 308,000 seeds/ha.

Shattercane (Sorghum bicolor) Interference in Soybean (Glycine max)

Weed Science ◽  
1992 ◽  
Vol 40 (1) ◽  
pp. 68-73 ◽  
Author(s):  
Gary M. Fellows ◽  
Fred W. Roeth
Keyword(s):  
Glycine Max ◽  
Plant Height ◽  
Direct Relationship ◽  
Yield Loss ◽  
Economic Loss ◽  
Hyperbolic Function ◽  
Yield Reduction ◽  
Soybean Plant ◽  
Soybean Yield ◽  
Forage Sorghum

Shattercane interference in irrigated soybean was evaluated during 1987, 1988, and 1989 at Clay Center, NE, using ‘Rox’ forage sorghum to simulate shattercane. Soybean yield reduction did not occur if shattercane was removed by 2 wk after emergence in 1987 and 6 wk after emergence in 1988 and 1989. Shattercane interference with soybean began when shattercane height exceeded soybean height. Soybean yield was reduced up to 25% before the height differential reached 30 cm, the minimum difference required for selectively applying glyphosate with a wiper applicator. Soybean nodes per stem, pods per stem, and beans per pod decreased as duration of interference increased. A direct relationship between soybean yield loss and shattercane density fit a rectangular hyperbolic function. Yield loss per shattercane plant was highest at low shattercane densities. Soybean plant height, biomass, nodes per stem, pods per stem, pods per node, and beans per pod decreased as shattercane density increased. An interference model for estimation of soybean yield and economic loss based on shattercane density was developed.

DETERMINING SOYBEAN YIELD IN HILL PLOTS

1984 ◽  
Vol 64 (2) ◽  
pp. 415-417
Author(s):  
R. I. BUZZELL ◽  
B. R. BUTTERY
Keyword(s):  
Glycine Max ◽  
Plant Density ◽  
Direct Selection ◽  
Soybean Yield ◽  
Soybean Cultivars ◽  
Glycine Max L ◽  
Hill Plots

Soybean (Glycine max (L.) Merr.) cultivars were tested for yield at various populations in hillplots that had plants compactly clumped and in comparative hill and row plots. Results indicated that thinning to a uniform stand should be worthwhile in cases where population varies and that selection in hills for material to be grown in rows could be from 43 to 95% as effective as direct selection in row plots.Key words: Glycine max, soybean cultivars, plant density, yield, hill plots, selection

scholarly journals Simulated mesotrione drift followed by glyphosate, imazethapyr, bentazon or glyphosate plus chlorimuron in soybean

2009 ◽  
Vol 89 (2) ◽  
pp. 265-272
Author(s):  
L. R. Brown ◽  
D. E. Robinson ◽  
K. Chandler ◽  
C. J. Swanton ◽  
R. E. Nurse ◽  
...  
Keyword(s):  
Glycine Max ◽  
Key Words ◽  
Plant Height ◽  
Seed Yield ◽  
Plant Density ◽  
Dry Weight ◽  
Shoot Dry Weight ◽  
Glycine Max L ◽  
Herbicide Drift

There have been anecdotal accounts of increased crop sensitivity due to herbicide drift followed by an in-crop herbicide. An experiment was conducted from 2005 to 2007 at Elora, Ridgetown, and Woodstock, Ontario, to determine the effects of simulated mesotrione drift followed by in-crop applications of glyphosate, imazethapyr, bentazon and glyphosate plus chlorimuron on glyphosate-resistant soybean [Glycine max (L.) Merr.] visual injury, plant height, plant density, shoot dry weight, and seed yield. As the rate of simulated mesotrione drift increased, there was an increase in soybean injury and a decrease in shoot dry weight, height, and yield. Simulated mesotrione drift followed by bentazon resulted in synergistic responses in injury shortly after application in some environments. This increase in injury was transient, with no synergistic responses in density, shoot dry weight, and yield. In contrast, antagonistic responses were observed when glyphosate, imazethapyr, or glyphosate plus chlorimuron were applied after simulated mesotrione drift in some environments. Further research is required to develop a better understanding of the interactions of drift followed by the application of an in-crop herbicide. Key words: Bentazon, chlorimuron, glyphosate, imazethapyr, mesotrione, synergism

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