soybean yield Articles
-
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 ...
-
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 ...
-
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 ...
-
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 ...
-
The associated effects of the soybean aphid resistance locus rag1 on soybean yield and other agronomic traits
The soybean aphid (Aphis glycines Matsumura) is a new invasive soybean [Glycine max (L.) Merr.] insect pest first identified in North America in 2000. A major aphid resistance gene Rag1 was identified and mapped from the maturity group VIII cultivar Dowling, and the gene has been introgressed into Midwest-adapted germplasm. The objective of this study was to test the associated effects of Rag1 on ...
-
New and old soybean cultivar responses to plant density and intercepted light
Genetic gain for new soybean [Glycine max (L.) Merr.] cultivars is substantial, and research suggests this is partially explained by greater tolerance to increased plant densities. We conducted an experiment to determine if greater tolerance to increased plant density and more efficient use of cumulative intercepted photosynthetically active radiation (CIPAR) partially explained the yield ...
-
Indigo Agriculture Shares February Corn and Soybean Yield Forecasts for the Americas
Indigo announced yield forecasts in January for corn and soybeans across the Americas, democratizing data for the grower community to better navigate global markets during the U.S. government shutdown. With the shutdown, the doors of the United States Department of Agriculture (USDA) had closed. No work in that department meant that there was an indefinite hold on a key report, known as the World ...
-
Evaluation of a simple method to screen soybean genotypes for salt tolerance
Excessive salt can reduce soybean yield [Glycine max (L.) Merr.] in grower fields. Salt-tolerant cultivars are needed to prevent field yield losses where excess salt is a problem. Soybean genotypes have primarily been evaluated for reaction to salt in the greenhouse using a labor-intensive and costly hydroponics method. A reliable, inexpensive method to screen soybean lines for salt tolerance ...
-
Pod removal, shade, and defoliation effects on soybean yield, protein, and oil
Soybean [Glycine max (L.) Merr.] yield formation in field environments can be either source-limited or sink-limited, depending on the assimilatory capacity of the mother plant relative to the assimilate demands of the developing seeds. Our objective was to evaluate yield and seed quality relationships under source-limited and sink-limited conditions during the seed-filling period, as protein and ...
-
Soybean seed yield response to planting date and seeding rate in the upper Midwest
Planting date and seeding rate are agronomic decisions that producers can use to maximize soybean [Glycine max (L) Merr.] seed yield and economic return. Current information on the response to planting date and seeding rate may underestimate the yield penalty for delayed planting in northern climates and overestimate the seeding rate required to optimize yield. The objective was to determine the ...
-
Soybean yield and soybean cyst nematode densities related to soil ph, soil carbonate concentrations, and alkalinity stress index
Soybean [Glycine max (L.) Merr.] grown on high pH, calcareous soils often suffer yield loss due to unavailability of Fe. Further yield decline can occur due to infestations by soybean cyst nematodes (Heterodera glycines Ichinohe; SCN) that are often present in greater numbers in high-pH soils. An observational study was conducted from 2001 to 2005 in Iowa to examine the relationships among: pH; ...
-
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 ...
-
Soybean yield and soybean cyst Nematode densities related to soil ph, soil carbonate concentrations, and alkalinity stress index
Soybean [Glycine max (L.) Merr.] grown on high pH, calcareous soils often suffer yield loss due to unavailability of Fe. Further yield decline can occur due to infestations by soybean cyst nematodes (Heterodera glycines Ichinohe; SCN) that are often present in greater numbers in high-pH soils. An observational study was conducted from 2001 to 2005 in Iowa to examine the relationships among: pH; ...
-
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 ...
-
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 ...
-
Agronomic management system and precipitation effects on soybean oil and fatty acid profiles
This study investigated long-term agronomic management systems and precipitation level effects on soybean [Glycine max (L.) Merr.] total oil content and fatty acid composition. Management systems evaluated included conventional (CT), no-till (NT), low chemical input (LI), and zero chemical input (ORG). Total oil content and major fatty acids profiles were analyzed by accelerated solvent extractor ...
-
USDA Comment Request: Draft Documents Related to GE Soybean Deregulation
On, March 12, 2019, USDA’s Animal and Plant Health Inspection Service (APHIS) announced the publication of two draft documents related to the potential deregulation of a soybean variety GE for increased yield and resistance to the herbicide glufosinate. The draft documents are Draft Plant Pest Risk Assessment (PPRA) and Draft Environmental Assessment (dEA) for Petition to Deregulate GE ...
-
Long-term agronomic performance of organic and conventional field crops in the mid-atlantic region
Despite increasing interest in organic grain crop production, there is inadequate information regarding the performance of organically-produced grain crops in the United States, especially in Coastal Plain soils of the mid-Atlantic region. We report on corn (Zea mays L.), soybean [Glycine max (L.) Merr.], and wheat (Triticum aestivum L.) yields at the USDA-ARS Beltsville Farming Systems Project ...
-
Canopy nitrogen reserves: impact on soybean yield and seed quality traits in northern latitudes
Soybean [Glycine max (L.) Merr.] seed produced in the upper Midwest of the United States is lower in protein concentration than soybean produced throughout much of the Corn Belt, the southern United States, and Brazil. As protein comprises on average more than 400 g kg–1 of the soybean seed, yields in northern latitudes may be limited by seed protein accrual. Our objective was to examine the role ...
-
Main-stem node removal effect on soybean seed yield and composition
Hail injury to soybean [Glycine max L. (Merr.)] is common across the United States. Currently, U.S. hail adjusters use procedures that assume that yield reductions caused by stem cutoff and defoliation or defoliation without stem loss is similar during the vegetative development period. Our hypothesis was that seed yield will be affected by timing of node removal in vegetative soybean and that ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you