Maximizing Soybean Yield by Understanding Planting Date, Maturity Group, and Seeding Rate Interactions in North Carolina

Research was conducted over 2 yr to evaluate soybean response to harvest aid herbicide treatments paraquat at 0.28 kg ai ha−1, paraquat with carfentrazone at 0.014 kg ai ha−1, and sodium chlorate at 6.72 kg ai ha−1. Indeterminate and determinate soybean cultivars were treated when moisture of seed collected from the uppermost four nodes of plants averaged 60, 50, 40, 30, and 20% (± 2%). For each soybean cultivar, the harvest aid treatment by application timing interaction was not significant, and data for harvest aid treatments were averaged. Application of harvest aid at 60% average seed moisture reduced yield for the maturity group (MG) IV indeterminate cultivar 15.4% compared with the nontreated; 100-seed weight was reduced 12.4%. Yield and seed weight were not negatively affected when harvest aid was applied at 50% average seed moisture and soybean was harvested 14 and 15 d before the nontreated control. Although planting date in the 2 yr for the indeterminate cultivar differed by 26 d, number of days from planting to harvest aid application at 50% average seed moisture was 112 and 116 d. For MG V and MG VI determinate cultivars, application of harvest aid at 60% average seed moisture reduced yield compared with the nontreated control 22 and 18.1%, respectively, and at 50% average seed moisture 15.6 and 4%, respectively; seed weight reductions of 8.9 to 33.3% accompanied the yield reductions of the two cultivars. Reduction in soybean yield and seed weight was not observed when harvest aid was applied at 40% average seed moisture, and harvest for the 2 yr was 8 and 9 d earlier for the MG V cultivar and 10 and 14 d earlier for the MG VI cultivar.

Download Full-text

Minimizing competition between glyphosate-resistant volunteer canola (Brassica napus) and glyphosate-resistant soybean: impact of soybean planting date and rate

Weed Technology ◽

10.1017/wet.2019.97 ◽

2019 ◽

Vol 34 (2) ◽

pp. 220-228

Author(s):

Allyson Mierau ◽

Eric N. Johnson ◽

Robert H. Gulden ◽

Jessica D. Weber ◽

William E. May ◽

...

Keyword(s):

Brassica Napus ◽

Economic Analysis ◽

Market Price ◽

Planting Date ◽

Optimal Rate ◽

Western Canada ◽

Seeding Rate ◽

Planting Dates ◽

Soybean Yield ◽

The Impact

AbstractIn recent years, soybean acreage has increased significantly in western Canada. One of the challenges associated with growing soybean in western Canada is the control of volunteer glyphosate-resistant (GR) canola, because most soybean cultivars are also glyphosate resistant. The objective of this research was to determine the impact of soybean seeding rate and planting date on competition with volunteer canola. We also attempted to determine how high seeding rate could be raised while still being economically feasible for producers. Soybean was seeded at five different seeding rates (targeted 10, 20, 40, 80, and 160 plants m−2) and three planting dates (targeted mid-May, late May, and early June) at four sites across western Canada in 2014 and 2015. Soybean yield consistently increased with higher seeding rates, whereas volunteer canola biomass decreased. Planting date generally produced variable results across site-years. An economic analysis determined that the optimal rate was 40 to 60 plants m−2, depending on market price, and the optimal planting date range was from May 20 to June 1.

Download Full-text

Effect of Planting Date and Maturity Group on Soybean Yield Response to Injury byMegacopta cribraria(Hemiptera: Plataspidae)

Journal of Economic Entomology ◽

10.1093/jee/tov314 ◽

2015 ◽

Vol 109 (1) ◽

pp. 207-212 ◽

Cited By ~ 11

Author(s):

J. L. Blount ◽

G. D. Buntin ◽

P. M. Roberts

Keyword(s):

Planting Date ◽

Yield Response ◽

Maturity Group ◽

Soybean Yield

Download Full-text

Midsouthern USA Soybean Yield Affected by Maturity Group and Planting Date

Crop Management ◽

10.1094/cm-2005-0418-01-rs ◽

2005 ◽

Vol 4 (1) ◽

pp. 1-8 ◽

Cited By ~ 6

Author(s):

Larry G. Heatherly

Keyword(s):

Planting Date ◽

Maturity Group ◽

Soybean Yield

Download Full-text

Soybean Yield as Affected by Planting Date and Maturity Group in the Southern Plains

Crop Management ◽

10.1094/cm-2012-0150-rs ◽

2013 ◽

Vol 12 (1) ◽

pp. CM-2012-0150-RS ◽

Cited By ~ 5

Author(s):

A. S. Barreiro ◽

C. B. Godsey

Keyword(s):

Planting Date ◽

Maturity Group ◽

Southern Plains ◽

Soybean Yield

Download Full-text

Planting date, row spacing, and seeding rate effects on soybean yield and yield components

10.31274/rtd-20201118-99 ◽

2000 ◽

Author(s):

Ryan Neal Clayton

Keyword(s):

Yield Components ◽

Planting Date ◽

Row Spacing ◽

Seeding Rate ◽

Soybean Yield ◽

Rate Effects ◽

Yield And Yield Components

Download Full-text

Individual and Combined Effects of Planting Date, Seeding Rate, Relative Maturity, and Row Spacing on Soybean Yield

Agronomy ◽

10.3390/agronomy11030605 ◽

2021 ◽

Vol 11 (3) ◽

pp. 605

Author(s):

Peder K. Schmitz ◽

Hans J. Kandel

Keyword(s):

Seed Yield ◽

Management Practices ◽

Synergistic Effects ◽

Canopy Cover ◽

Planting Date ◽

Row Spacing ◽

Growth Stages ◽

Seeding Rate ◽

Yield Increase ◽

Beginning Of Flowering

Planting date (PD), seeding rate (SR), relative maturity (RM) of cultivars, and row spacing (RS) are primary management factors affecting soybean (Glycine max (L.) Merr.) yield. The individual and synergistic effects of PD, SR, RM, and RS on seed yield and agronomic characteristics in North Dakota were herein investigated. Early and late PD, early and late RM cultivars, two SR (408,000 and 457,000 seed ha−1), and two RS (30.5 and 61 cm) were evaluated in four total environments in 2019 and 2020. Maximizing green canopy cover prior to the beginning of flowering improved seed yield. Individual factors of early PD and narrow RS resulted in yield increase of 311 and 266 kg ha−1, respectively. The combined factors of early PD, late RM, high SR, and narrow RS improved yield by 26% and provided a $350 ha−1 partial profit over conventional practices. Canopy cover and yield had relatively weak relationships with r2 of 0.36, 0.23, 0.14, and 0.21 at the two trifoliolate, four trifoliolate, beginning of flowering, and beginning of pod formation soybean growth stages, respectively. Producers in the most northern soybean region of the USA should combine early planting, optimum RM cultivars, 457,000 seed ha−1 SR, and 31 cm RS to improve yield and profit compared to current management practices.

Download Full-text

The Effects of Management (Tillage, Fertilization, Plant Density) on Soybean Yield and Quality in a Three-Year Experiment under Transylvanian Plain Climate Conditions

Land ◽

10.3390/land10020200 ◽

2021 ◽

Vol 10 (2) ◽

pp. 200

Author(s):

Felicia Chețan ◽

Cornel Chețan ◽

Ileana Bogdan ◽

Adrian Ioan Pop ◽

Paula Ioana Moraru ◽

...

Keyword(s):

Plant Density ◽

Conventional Tillage ◽

Quality Parameters ◽

Soil Tillage ◽

Reduced Tillage ◽

Seeding Rate ◽

Soybean Yield ◽

Climate Conditions ◽

Yield And Quality ◽

Tillage System

The regional agroecological conditions, specific to the Transylvanian Plain, are favorable to soybean crops, but microclimate changes related to global warming have imposed the need for agrotechnical adaptive measures in order to maintain the level of soybean yield. In this study, we consider the effect of two soil tillage systems, the seeding rate, as well as the fertilizer dosage and time of application on the yield and quality of soybean crops. A multifactorial experiment was carried out through the A × B × C × D − R: 3 × 2 × 3 × 3 − 2 formula, where A represents the year (a1, 2017; a2, 2018; and a3, 2019); B represents the soil tillage system (b1, conventional tillage with mouldboard plough; b2, reduced tillage with chisel cultivator); C represents the fertilizer variants (c1, unfertilized; c2, one single rate of fertilization: 40 kg ha−1 of nitrogen + 40 kg ha−1 of phosphorus; and c3, two rates of fertilization: 40 kg ha−1 of nitrogen + 40 kg ha−1 of phosphorus (at sowing) + 46 kg ha−1 of nitrogen at V3 stage); D represents the seeding rate (1 = 45 germinating grains (gg) m−2; d2 = 55 gg m−2; and d3 = 65 gg m−2); and R represents the replicates (r1 = the first and r2 = the second). Tillage had no effect, the climate specific of the years and fertilization affected the yield and the quality parameters. Regarding the soybean yield, it reacted favorably to a higher seeding rate (55–65 gg m−2) and two rates of fertilization. The qualitative characteristics of soybeans are affected by the fertilization rates applied to the crop, which influence the protein and fiber content in the soybean grains. Higher values of protein content were recorded with a reduced tillage system, i.e., 38.90 g kg−1 DM in the variant with one single rate of fertilization at a seeding rate of 45 gg per m−2 and 38.72 g kg−1 DM in the variant with two fertilizations at a seeding rate of 65 gg m−2.

Download Full-text