scholarly journals Soybean Seed Production and Nitrogen Nutrition

10.5772/52287 ◽  
2013 ◽  
Author(s):  
Takuji Ohyama ◽  
Ritsuko Minagawa ◽  
Shinji Ishikawa ◽  
Misaki Yamamoto ◽  
Nguyen Van Phi Hung ◽  
...  
Keyword(s):  
Seed Production ◽  
Nitrogen Nutrition ◽  
Soybean Seed

Interference and Seed Production by Common Lambsquarters (Chenopodium album) in Soybeans (Glycine max)

Weed Science ◽  
1990 ◽  
Vol 38 (2) ◽  
pp. 113-118 ◽  
Author(s):  
S. Kent Harrison
Keyword(s):  
Seed Production ◽  
Seed Yield ◽  
Chenopodium Album ◽  
Soybean Seed ◽  
Dry Weight ◽  
Threshold Level ◽  
Yield Reduction ◽  
Significant Treatment ◽  
Weed Biomass ◽  
Common Lambsquarters

Multiple regression and response surface plots were used to analyze the effects of common lambsquarters population density and interference duration on weed growth and soybean seed yield. Under favorable growing conditions in 1986, weed biomass production at all population densities and interference durations was four to five times that produced in 1987, under less favorable conditions. However, there was no significant treatment by year interaction for soybean seed yield reduction by common lambsquarters, and production of each kg/ha weed biomass resulted in an average soybean yield reduction of 0.26 kg/ha. Utilizing 5% yield loss as an arbitrary threshold level, the regression equation predicted a common lambsquarters density threshold of 2 plants/m of row for 5 weeks of interference after crop emergence and 1 plant/m of row for 7 weeks. Seed production by individual common lambsquarters plants was highly correlated (r=0.92) with weed dry weight, and seed production ranged from 30 000 to 176 000 seeds/plant.

Calcium Effects on Soybean Seed Production, Elemental Concentration, and Seed Quality

Crop Science ◽  
2000 ◽  
Vol 40 (2) ◽  
pp. 476-482 ◽  
Author(s):  
M.G. Burton ◽  
M.J. Lauer ◽  
M.B. McDonald
Keyword(s):  
Seed Production ◽  
Elemental Concentration ◽  
Seed Quality ◽  
Soybean Seed ◽  
Calcium Effects

scholarly journals Spatial variability in soybean seeds quality and in chemical attributes of the soil of a production field in the Brazilian Cerrado

2018 ◽  
Vol 40 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Danielle Helena Müller ◽  
Elisangela Clarete Camili ◽  
Walcylene Lacerda Matos Pereira Scaramuzza ◽  
Maria Cristina de Figueiredo e Albuquerque
Keyword(s):  
Spatial Variability ◽  
Seed Production ◽  
Seed Mass ◽  
Soybean Seed ◽  
Accelerated Aging ◽  
Exchange Capacity ◽  
Soybean Seeds ◽  
Distribution Maps ◽  
Chemical Attributes ◽  
Definition Of

Abstract: The objective of this study was to evaluate the spatial variability in soybean seeds quality and in soil chemical attributes of a production field. Data were collected at 138 georeferenced points of a soybean production property located in Santo Antônio de Leverger - MT. Soil related variables, such as phosphorus, potassium, calcium, magnesium, and organic matter (OM) contents, pH, cation exchange capacity (CEC) and base saturation (V%) were evaluated. On the other hand, yield, one thousand seed mass, size, germination, emergence in seedbed, electrical conductivity, accelerated aging and tetrazolium reaction were evaluated as seed variables. The data were submitted to descriptive and geostatistical analysis, and the fit semivariogram parameters were used to elaborate spatial distribution maps of the analyzed variables. After the analysis, it was possible to conclude that there was spatial variability in the evaluated attributes for both seeds and soil related variables, indicating that the soybean seed production area can be divided into management zones, which allows the definition of areas to be harvested or discarded within a field of seed production.

scholarly journals Mechanical damage caused by the use of grain carts for transport during soybean seed harvest

2018 ◽  
Vol 40 (4) ◽  
pp. 422-427
Author(s):  
Rodrigo Albaneze ◽  
Francisco Amaral Villela ◽  
Jean Carlo Possenti ◽  
Karina Guollo ◽  
Ivan Carlos Riedo
Keyword(s):  
Moisture Content ◽  
Seed Production ◽  
Seed Coat ◽  
Seed Viability ◽  
Mechanical Damage ◽  
Soybean Seed ◽  
Soybean Seeds ◽  
High Quality ◽  
Moisture Contents ◽  
Seed Harvest

Abstract: Mechanical damage constitutes one of the factors limiting production of high quality soybean seeds. The aim of this study was to evaluate the effects on seed viability and mechanical damage caused to soybean seeds when using a grain cart, together with an auger unloading system, as a means of transporting grain from the combine to the truck. Seed samples were collected in two seed production fields in the region of Abelardo Luz, SC, Brazil, at three different times (10:00, 12:30, and 16:00) and from three places (in the combine grain tank, in the grain wagon, and in the truck). The percentages of broken seeds, moisture content, mechanical damage to the seed coat, and germination were evaluated. The use of auxiliary grain cart equipment contributed to an increase in breakage and mechanical injury in seeds, worsening seed viability. Seeds collected at lower moisture contents had higher breakage and higher rates of mechanical damage.

scholarly journals Hybrid Soybean Seed Production: Comparison of Three Methods

Crop Science ◽  
1996 ◽  
Vol 36 (6) ◽  
pp. 1560-1567 ◽  
Author(s):  
K. S. Lewers ◽  
S. K. St. Martin ◽  
B. R. Hedges ◽  
M. P. Widrlechner ◽  
R. G. Palmer
Keyword(s):  
Seed Production ◽  
Soybean Seed
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