soybean Articles

  • Genetic diversity in a soybean collection

    Soybean [Glycine max (L.) Merr.] was domesticated in China, and cultivated landraces were initially distributed throughout Asia and more recently extended to Europe and America. Previous studies of genetic diversity suggest a strong genetic bottleneck between Asian and North American soybean genetic pools. However, little is known about the potentially useful genetic diversity present in European ...

  • Soybean aphid feeding injury and soybean yield, yield components, and seed composition

    Information that describes soybean aphid (Aphis glycines Matsumura) feeding injury effects on soybean [Glycine max (L.) Merr.] yield and seed composition is needed to develop better management practices for this invasive pest. This 2-yr controlled-infestation field study measured aphid populations and the effects of those populations on soybean seed yield, yield components (shoot biomass, pods ...

  • Varietal differences and morphology of cleistogamy in soybean

    Cleistogamy, the production of open (chasmogamous, CH) and closed (cleistogamous, CL) floral forms by one species, is present in soybean [Glycine max (L.) Merr.]. Soybean cultivars that originated from high latitudes generally have a strong tendency to produce CL flowers. The first objective of this study was to determine varietal differences in cleistogamy. The second objective was to observe ...

  • Effect of fungicide on soybean growth and yield

    In response to rising input costs and narrowing profit margins, soybean [Glycine max (L.) Merr.] producers are continually looking for ways to increase soybean yield. One approach being promoted is the use of foliar fungicides, for both foliar pathogen control and nonfungicidal plant physiological effects. The objective of this field experiment was to evaluate a strobilurin and a triazole alone ...

  • SOYPOD: a model of fruit set in soybean

    The soybean [Glycine max (L.) Merr.] plant matches its reproductive potential to environmental conditions by adjusting the number of fruits and seeds that it produces. This adjustment is an important, but not well understood, part of the yield production process. Developing a model of fruit set will contribute greatly to a better understanding of the determination of fruit number and yield. The ...

  • Mechanisms involved in soybean rust-induced yield reduction

    Soybean rust (SBR; caused by Phakopsora pachyrhizi Syd. and P. Syd.) leads to premature leaf loss and yield reduction. The objectives of this study were to assess effects of SBR infection on soybean [Glycine max (L.) Merrill] yield and to identify causes for the yield reduction. Experiments were conducted in the 2005–2006 and 2006–2007 growing seasons at Londrina, Brazil. The five treatments were ...

  • Daily price and volatility behaviour in soybean oil market

    Volatility in agricultural futures markets is an important research area and has been a cause for concern among governments, traders, producers, and consumers. The purpose of this article is to investigate the financial and currency sources of price and volatility distortion of soybean oil future prices, using a GJR-GARCH model. The crucial element of the study is the inclusion of currency, ...


    By Inderscience Publishers

  • Endosperm size diversity in domesticated, wild, and semiwild soybean

    Past literature documents that domesticated soybean, Glycine max (L.) Merr., has trivial to almost nonexistent galactomannan-containing endosperm in mature dormant seeds. Current preliminary observations confirm limited endosperm for many domesticated soybean accessions, but show that many others have markedly larger endosperm, as do all wild (G. soja Sieb. & Zucc.) and semiwild (G. gracilis ...

  • Quantifying vapor drift of dicamba herbicides applied to soybean

    Recent advances in biotechnology have produced cultivars of corn, soybean, and cotton resistant to the synthetic‐auxin herbicide dicamba. This technology will allow dicamba herbicides to be applied in new crops, at new periods in the growing season, and over greatly expanded areas, including postemergence applications in soybean. From past and current use in corn and small grains, dicamba vapor ...


    By John Wiley & Sons, Ltd.

  • Growing demand for soybeans threatens Amazon rainforest

    Some 3,000 years ago, farmers in eastern China domesticated the soybean. In 1765, the first soybeans were planted in North America. Today the soybean occupies more U.S. cropland than wheat. And in Brazil, where it spread even more rapidly, the soybean is invading the Amazon rainforest. For close to two centuries after its introduction into the United States the soybean languished as a curiosity ...


    By Earth Policy Institute

  • Effects of Bisphenol A on antioxidant system in soybean seedling roots

    Bisphenol A (BPA), an emerging pollutant in the environment, with potential toxic effects on plants; however, the toxicity mechanism remains largely unknown. The antioxidant system plays an important role in protecting plants against the damage of stress. Here, the effects of BPA on the antioxidant system [superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), ascorbic acid (AsA), ...


    By John Wiley & Sons, Ltd.

  • Effects of bisphenol a on mineral nutrition in soybean seedling roots

    Bisphenol A (BPA) is a ubiquitous chemical in the environment and is potentially harmful to plants. However, relevant studies on the effects of BPA on plants are relatively scarce. In the present work, the effects of BPA on the biomass (fresh and dry weight), absorptive function (activity and absorptive area), and mineral element levels in soybean (Glycine max L.) seedling roots treated with ...


    By John Wiley & Sons, Ltd.

  • Tocopherols Concentration and Stability in Early Maturing Soybean Genotypes

    Soybean [Glycine max (L.) Merr.] is an important source of tocopherols which have health-beneficial properties. A study was conducted to determine tocopherols concentration and stability in early maturing soybean genotypes and to determine their relationships to other important seed characteristics. Twenty soybean genotypes were grown in replicated trials in six environments of eastern Canada, ...

  • Rotational effects of cuphea on corn, spring wheat, and soybean

    Diversifying crop rotations can give economic and environmental benefits. Cuphea (Cuphea viscosissima Jacq. x C. lanceolata W.T. Aiton) is a new oilseed crop that grows well in the Corn Belt. However, little is known about its rotational effect on corn (Zea mays L.), soybean [Glycine max (L.) Merr.], and spring wheat (Triticum aestivum L.), which are predominant crops in this region. A 4-yr study ...

  • Effect of row spacing and seeding rate on soybean yield

    Soybean [Glycine max (L.) Merr.] yield response to narrow row spacing has been consistently positive in the upper Midwest and new split-row planters have made narrow row soybean production feasible, yet adoption has been slow in Iowa. Wide (76-cm) and narrow (38-cm) row spacing and four seeding rates (185,000; 309,000; 432 000; and 556,000 seeds ha–1) were evaluated at three locations during ...

  • China’s Rising Soybean Consumption Reshaping Western Agriculture

    Global demand for soybeans has soared in recent decades, with China leading the race. Nearly 60 percent of all soybeans entering international trade today go to China, making it far and away the world’s largest importer. The soybean was domesticated some 3,000 years ago by farmers in eastern China. But it wasn’t until well after World War II that the crop gained agricultural ...


    By Earth Policy Institute

  • Probability of yield response to inoculants in fields with a history of soybean

    Inoculants containing Bradyrhizobium japonicum are available for soybean [Glycine max (L.) Merr.] production but may not be necessary in fields where soybean previously has been produced. The objective of this study was to determine yield response and probability of an economic return from inoculants in fields with a recent history of soybean production. Fifty-one inoculant products were ...

  • Analysis of high yielding, early-planted soybean in Indiana

    A trend toward early planting of soybean [Glycine max (L.) Merr.] in Indiana results in higher yield, but the limit to which a positive response to early planting occurs has not been evaluated. Our objective was to determine how early planting affects yield components and seed composition of indeterminate soybean planted in late March through early June in Indiana. Three cultivars (Pioneer brand ...

  • A regional analysis of the response of soybean yield to planting date

    Planting date is a critical aspect of all soybean [Glycine max (L.) Merr.] production systems, but the response of yield to planting date fluctuates widely among environments. A combined analysis of many planting date experiments will provide a better estimate of the average response. Data from 28 nonirrigated planting date experiments that were conducted for more than 1 yr with at least three ...

  • Soybean aphid population dynamics, soybean yield loss, and development of stage-specific economic injury levels

    Stage-specific economic injury levels (EILs) form the basis of integrated pest management for soybean aphid (Aphis glycines Matsumura) in soybean [Glycine max (L.) Merr.]. Experimental objectives were to develop a procedure for calculating EILs of the soybean aphid specific to the R2 (full bloom), R4 (full pod), and R5 (beginning seed) soybean development stages using the law of the diminishing ...

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