Variation in soybean yield components in relation to genotype and productivity level

1975 ◽  
Author(s):  
Paulo Fernando Burlamaqui
Keyword(s):  
Yield Components ◽  
Productivity Level ◽  
Soybean Yield

scholarly journals Increasing population density reduces soybean yield components and productivity

2021 ◽  
Vol 37 ◽  
pp. e37042
Author(s):  
Marcelo De Almeida Silva ◽  
Ana Carolina De Santana Soares ◽  
Melina Rodrigues Alves Carnietto ◽  
Alexandrius De Moraes Barbosa
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Spatial Arrangement ◽  
Plant Population ◽  
Row Spacing ◽  
Individual Plant ◽  
Growth Type ◽  
Soybean Yield ◽  
Plant Densities ◽  
Plant Yields

Studies addressing the interaction of different spatial arrangement in soybean are needed in order to achieve management that leads to higher grain yield associated with rational seed use. The objective of this work was to evaluate the yield components and productivity of an undetermined growth type soybean as a function of different row spacing and plant densities. The treatments consisted of three row spaces (0.25, 0.35 and 0.45 m) and three plant population densities (30, 40 and 50 plants/m²). There was no interaction of row spaces and plant population on soybean yield. Regarding the overall spacing average, the grain yield of the population of 30/m² plants was higher than the productivity of the populations of 40 and 50/m² plants. The largest populations reduce plant sizes due to greater competition between plants. In addition, smaller populations promote higher individual plant yields due to the increase components of the production. This characteristic is defined as the ability of the plant to change its morphology and yield components in order to adapt to the conditions imposed by the spatial arrangement.

scholarly journals Interference of GR® Volunteer Corn Population and Origin on Soybean Grain Yield Losses

2018 ◽  
Vol 36 (0) ◽  
Author(s):  
C. PIASECKI ◽  
M.A. RIZZARDI ◽  
D.P. SCHWADE ◽  
M. TRES ◽  
J. SARTORI
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Individual Plant ◽  
Soybean Yield ◽  
Maximum Loss ◽  
Tillage System ◽  
Volunteer Corn ◽  
Corn Plants ◽  
F2 Generation ◽  
The Impact

ABSTRACT: The cultivation of GR® maize prior to soybean, mainly in the no-tillage system favors the higher occurrence of GR® volunteer corn interfering in soybean crops. Volunteer corn originate from seeds that were lost during harvest or from non-harvested seeds from the field; these are individual seeds, originating individual plants, or several seeds adhered to segments of the rachis, which originate clumps. Volunteer corn in the form of clumps predominates in soybean crops, but little information about its effect on soybean is available in the literature. During two years, three experiments were carried out with the objective of evaluate the impact of the interference of GR® F2 generation volunteer corn populations coming from individual and clump seeds (seven corn plants emerged at the same point) over soybean yield components and grain yield. The results show that losses in soybean yield components and grain yield are influenced by the population and origin of volunteer corn. Clumps cause losses over 90% for populations above four clumps m-2, while the mean maximum loss observed for individual plants was 83% in the largest studied populations. Soybean yield decreased significantly when competing with populations below one plant or clump m-2, being 16% and 46% in the population of 0.5 individual plant and clump m-2, respectively.

scholarly journals Correlations of soybean yield with soil porosity and bulk density of an Oxisol

2018 ◽  
Vol 48 (4) ◽  
pp. 476-485
Author(s):  
Sérgio Ricardo Lima Negro ◽  
Diego dos Santos Pereira ◽  
Rafael Montanari ◽  
Flávio Carlos Dalchiavon ◽  
Christtiane Fernandes Oliveira
Keyword(s):  
Spatial Variability ◽  
Grain Yield ◽  
Bulk Density ◽  
Yield Components ◽  
Particle Density ◽  
Soil Porosity ◽  
No Tillage ◽  
Soybean Yield ◽  
Volumetric Flask ◽  
Soil Attributes

ABSTRACT The spatial variability of soil physical attributes is important to indicate management practices that best suit agricultural areas. This study aimed to analyze spatial correlations between soybean grain yield and soil mass-volume relationships, in order to select which attribute is correlated with yield, as well as to evaluate the spatial variability of soil attributes and yield components of this crop, in an Oxisol under no-tillage system. The soil attributes analyzed (0.0-0.10 m and 0.10-0.20 m) were the following ones: soil bulk density (paraffin-coated clod and volumetric ring methods), particle density (volumetric flask and modified volumetric flask methods) and total porosity. The soybean yield components were evaluated as it follows: grain yield, number of pods per plant, number of grains per pod, mass of 100 grains, grain mass per plant, plant population and plant height. The total soil porosity, calculated by the relations between the bulk density (volumetric ring method) and particle density (volumetric flask), in the 0.10-0.20 m layer, was the best indicator of soybean grain yield under no-tillage conditions.

scholarly journals Do Weeds From Seeds or Regrowth in Coexistence Periods Alter Biochemical and Yield Characteristics of Soybeans?

2019 ◽  
Vol 11 (10) ◽  
pp. 264
Author(s):  
Ana Paula Rockenbach ◽  
Mauro Antônio Rizzardi ◽  
Adriana Favaretto ◽  
Theodoro Schneider ◽  
Andréa Michel Sobottka
Keyword(s):  
Secondary Metabolism ◽  
Seed Yield ◽  
Yield Components ◽  
Field Experiments ◽  
Rio Grande ◽  
Total Phenols ◽  
Rio Grande Do Sul ◽  
Soybean Yield ◽  
Volunteer Corn ◽  
Seed Yields

The objective of this study was to evaluate changes in soybean secondary metabolism and soybean yield components when subjected to coexistence periods with volunteer corn and established horseweed (Conyza spp.) regrowth. Two field experiments were conducted in the agricultural years 2015/2016 and 2016/2017 at Passo Fundo University, Passo Fundo, Rio Grande do Sul, Brazil. Experiment I was conducted in the agricultural year 2015/2016 in order to establish periods of coexistence between soybean and corn. The treatments consisted of two soybean densities in the main plots (175,000 and 350,000 plants ha-1) and different periods of coexistence between soybean and corn in the subplots. Experiment II was conducted in the agricultural year of 2016/2017 in order to investigate the interference of regrowth horseweed during coexistence periods with soybean. The total phenols, flavonoids, saponins, soybean yield components and seed yields were evaluated. Volunteer corn that initiates growth after the V4 soybean stage and horseweed regrowth during cultivation do not adversely affect secondary metabolism, seed yield or soybean yield components.

scholarly journals Changes in Soybean Yield Components in Response to Dicamba

age ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 1-6
Author(s):  
Matthew R. Foster ◽  
James L. Griffin
Keyword(s):  
Yield Components ◽  
Soybean Yield
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