Shifts in Soybean Yield, Nutrient Uptake, and Nutrient Stoichiometry: A Historical Synthesis‐Analysis

Balboa, G. R.; Sadras, Víctor O.; Ciampitti, Ignacio A.

doi:10.2135/cropsci2017.06.0349

Cited by 61 publications

(42 citation statements)

References 94 publications

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“…These findings were in agreement with Kurihara et al (2013), who studied ten soybean cultivars at 28 commercial farms in the state of Mato Grosso do Sul. However, plant nutrient use efficiency has increased with genetic improvement and varies widely between different soybean cultivars, especially those with different growth habits (Bender et al, 2015;Gaspar et al, 2017, Balboa et al, 2018. Note.…”

Section: Resultsmentioning

confidence: 99%

Yield and Nutrient Uptake of Soybean Cultivars Under Intensive Cropping Systems

Bortolon¹,

Bortolon²,

Camargo³

et al. 2018

JAS

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Sustainable agricultural systems are necessary to improve soybean [Glycine max (L.) Merr.] seed yield and to increase nutrient use efficiency. Intensification of agricultural systems is an important tool to increase farmers’ profitability in the Cerrado region (Brazil), where soybean is rotated with corn in the same growing season. However, this intensification requires soybean cultivar with short growing periods which is achieved by indeterminate soybean cultivars. There is a lack of information regarding the nutrient uptake by soybean cultivars under intensive agricultural systems in the Cerrado. We sought to investigate soybean biomass production and soybean seed yield of determinate and indeterminate soybean cultivars. We also aimed to quantify the amounts of nutrients taken up by soybean biomass and seeds. Field research was conducted to evaluate 17 soybean cultivars commonly grown by farmers, and we considered the determinate and indeterminate soybean growth habit. Nutrient uptake and aboveground soybean biomass were higher under shorter soybean growth and development cycles. Nitrogen, phosphorus and potassium extraction in modern cultivars was higher than in cultivars used in past decades. Nutrient use efficiency was higher in determinate soybean cultivars than in indeterminate soybean cultivars.

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Section: Resultsmentioning

confidence: 99%

Yield and Nutrient Uptake of Soybean Cultivars Under Intensive Cropping Systems

Bortolon¹,

Bortolon²,

Camargo³

et al. 2018

JAS

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“…Soybeans are the most important global source of protein for animal feeds and vegetable oil (Balboa et al, 2018;Stein et al, 2008). While soybean and soybean products have been consumed for thousands of years in Asian cuisine, technological advances in soybean processing have led to newer high-quality, versatile, and nutritious food products (Rayaprolu et al, 2015;Shurtleff and Aoyagi, 2016).…”

Section: Npcf For Soybean Proteinmentioning

confidence: 99%

Calculation of Nitrogen‐to‐Protein Conversion Factors: A Review with a Focus on Soy Protein

Krul¹

2019

J Americ Oil Chem Soc

101

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Protein content in foods and feeds is measured indirectly by nitrogen determination, requiring a nitrogen‐to‐protein conversion factor (NPCF). Historically, 6.25 was applied to all proteins based on two assumptions: (1) all proteins had a nitrogen content of 16% (100/16 = 6.25) and (2) all nitrogen was derived from protein. Amino acid analyses revealed that a conversion factor of 6.25 overestimated the protein content of most foods due to variations in amino acid profiles and nonprotein nitrogen. The lack of standardization of methods to determine food‐specific NPCF has resulted in continued use of 6.25 and inconsistent development of new factors. This review summarizes efforts made to derive NPCF for various foods. Soy protein has been the subject of considerable debate since publication of the “Jones factors” in 1931, which based the soy conversion factor of 5.71 on the nitrogen content of glycinin. Nonetheless, 6.25 is still used by the soy industry, analytic associations, and government regulatory bodies. Given the impact to the valuation of soy protein products and food relabeling costs, changes to soy alone appear discriminatory in the absence of standardized methods for developing NPCF for all proteins. Proposed solutions include (1) developing a consensus method to determine NPCF applicable to all foods, (2) applying standardized NPCF to measure protein in all foods and assessing the economic, nutritional, and regulatory consequences equitably, and (3) developing standardized direct methods to measure protein, such as amino acid analyses, in foods intended as single sources in vulnerable populations where more accurate measurement and reducing any risk of adulteration with nonprotein nitrogen are essential.

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“…Increases in soybean production have been facilitated by genetic improvements in short-season soybean varieties that have increased yield steadily since 1930 (Voldeng, Cober, Hume, Gillard, & Morrison, 1997), and even greater overall yields have been seen since 2006 (Balboa, Sadras, & Ciampitti, 2018). Similarly, the increase in corn may be partially attributed to the high yield potential of short-season varieties modified from tropical germplasm (Carena, Pollak, Salhuana, & Denue, 2009).…”

Section: Geneticmentioning

confidence: 99%

Cropping pattern changes diminish agroecosystem services in North and South Dakota, USA

et al. 2020

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In the past several decades, North and South Dakota have experienced increased agricultural expansion and crop rotation simplification, namely an increase in corn (Zea mays L.)– soybean [Glycine max (L.) Merr.] systems. This review investigates the nature and extent of those changes, the underlying causes, and the consequences they have on ecosystem services. The framework of ecosystem services is underutilized in agricultural research, but it can be used to describe the sustainability, resistance, and resilience of the system in relation to these land use changes. The current trends are focused on maximizing provisioning services (i.e., food and fuel) at the expense of regulating, cultural, and supporting services. The decline of regulating services can be seen in increased peak river flow (up to 100% and 200% increases in South and North Dakota, respectively), as well as by the 100% increase in area treated by chemicals, partially due to diminished bioregulation of pests and weeds. The effects on supporting services are demonstrated by altered C balances and water cycling, while the loss of cultural connection to the land is evidenced by a 40% decrease in land conservation since 1997. Overall, these changes are making the land in North and South Dakota more susceptible to stressors, such as drought, crop pests, or even economic trends that could greatly harm these agroecosystems and have nationwide ramifications. To address these changes, producers need to provide a balance of agroecosystem services by optimizing currently available management strategies and possibly transforming agricultural practices for long‐term system stability.

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Shifts in Soybean Yield, Nutrient Uptake, and Nutrient Stoichiometry: A Historical Synthesis‐Analysis

Cited by 61 publications

References 94 publications

Yield and Nutrient Uptake of Soybean Cultivars Under Intensive Cropping Systems

Yield and Nutrient Uptake of Soybean Cultivars Under Intensive Cropping Systems

Calculation of Nitrogen‐to‐Protein Conversion Factors: A Review with a Focus on Soy Protein

Cropping pattern changes diminish agroecosystem services in North and South Dakota, USA

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