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Browse by Author: Rachel Vann
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The Soybean Plant

By: Katherine Drake Stowe, Rachel Vann

This publication, chapter 1 of the North Carolina Soybean Production Guide, describes the soybean plant and its various growth stages.

North Carolina Soybean Production Guide

By: Katherine Drake Stowe, Rachel Vann, Carl Crozier, Gary Bullen, Jim Dunphy, Wesley Everman, Luke Gatiboni, Adrienne Gorny, David Hardy, Ryan Heiniger, Steph Kulesza, Nick Piggott, Dominic Reisig, Gary Roberson, Heidi Schweizer, Lindsey Thiessen, Derek Washburn, Deanna Osmond

This publication provides information to growers about soybean production in North Carolina. It discusses economic trends and forecasts, cultural practices, variety selection, planting decisions, nutrient management, diseases and pests, and other production practices.

Chapter 5: Crop Production Management - Organic Soybeans

By: Rachel Vann, DJ Stokes, Dominic Reisig, LeAnn Lux, Chris Reberg-Horton

This chapter of the North Carolina Organic Commodities Production Guide covers key management practices for organic soybean production: variety selection, planting times, plant population, and crop rotation.

How Have Foliar Treatments Affected Soybean Yields in North Carolina Trials?

By: Rachel Vann, Jim Dunphy, Lindsey Thiessen, Michael Buffaloe

This publication discusses the trends identified by research on the impacts of foliar fungicides and fertilizers on soybean yields in various environments across North Carolina.

Planting Decisions

By: Rachel Vann, Jim Dunphy, Adrienne Gorny, Dominic Reisig, Gary Roberson

This publication, chapter 5 of the North Carolina Soybean Production Guide, discusses soybean planting decisions, including planting dates, depth, and seeding equipment calibration.

Nonfoliar Yield Enhancement Products in North Carolina Soybeans

By: Rachel Vann, Jim Dunphy, Lindsey Thiessen, Michael Buffaloe

This publication discusses trends identified in how nonfoliar yield enhancement products affected soybean yield over the past five years across 15 locations in North Carolina.

Managing Cereal Rye for Benefits in Cotton and Soybeans

By: Rachel Vann, Charlie Cahoon, Guy Collins

This publication discusses the use of cereal rye as a cover crop in soybeans in cotton to determine the effects on weed suppression and soil moisture retention in relation to yields.

Planting Rate Recommendations for Organic Soybean Producers

By: George Place, Adam Smith, Rachel Vann, Chris Reberg-Horton

For organic soybean producers increased seeding rates improve early soybean canopy density, which shades out weeds in the early stages of weed competition. Organic soybean producers can increase seeding rates with much less of a negative impact on economic return than for conventional production with herbicides.

Soybean Fertilizer Burn

By: Rachel Vann, Donald Stokes

Fertilizer burn can occur to the soybean seed from an in-furrow application and to the foliage from a foliar application. An in-furrow application can cause salt injury or ammonium toxicity to the soybean seed. Fertilizer is somewhat rarely applied to soybeans over-the-crop, however if it is done fertilizer burn can occur depending on source and concentration. This factsheet discusses the symptoms and management of fertilizer burn.

Rotational Considerations

By: Rachel Vann, Jim Dunphy

This publication, chapter 3 of the North Carolina Soybean Production Guide, discusses crop rotation and cover crops in soybean production.

Soybean Hail Damage

By: Rachel Vann, Donald Stokes

This factsheet discusses how to mitigate hail damage in soybean production in North Carolina.

Soybean Deep Planting

By: Rachel Vann, Donald Stokes

This publication discusses planting depth for soybean producers in North Carolina.

Grain Pea Production in North Carolina

By: Rachel Vann, Chris Reberg-Horton, Esleyther Henriquez Inoa

This publication discusses the findings of applied research conducted to answer production questions about growing grain peas in North Carolina. Topics include planting date, seeding rate, and variety selection.

Cotton Production with Conservation Tillage

By: Keith Edmisten, Guy Collins, Rachel Vann

This publication, chapter 13 of the 2024 Cotton Information handbook, covers the role of conservation tillage as it relates to cotton production.

Challenges with Herbicide Resistance and Value of Cultural Practices in Managing Weeds: Examples from Research in North Carolina

By: Ramon Leon Gonzalez, David Jordan, Katie Jennings, David Monks, Matthew Vann, Loren Fisher, Wesley Everman, Charlie Cahoon, Matt Inman, Chris Reberg-Horton, Rachel Vann, Denis Mahoney, Drew Hare, Alan York

A few weed species in North Carolina have become pervasive across the state and are frequently found in different crops. They form dense populations and reduce yields, making production more challenging. This publication discusses herbicide-resistant biotypes in agronomic and vegetable crops in North Carolina and reviews herbicide resistance management recommendations.

Key Management Strategies to Increase North Carolina Soybean Yield: What We Have Learned From 877 Soybean Yield Contest Entries

By: Rachel Vann, Jim Dunphy, Katherine Drake-Stowe, Greg Buol

This publication, chapter 10 of the North Carolina Soybean Production Guide identifies the management strategies that have been the strongest predictors of high soybean yield based on decades of information gathered through the North Carolina Soybean Yield contests.

Soybean Deer Damage

By: Rachel Vann, Donald Stokes

This factsheet discusses recognizing and treating soybeans that have been damaged by deer in North Carolina.

Termination Timing Effect on Cereal Rye Biomass

By: Austin Menker, Hannah Howe, Rachel Vann, Dominic Reisig, Chris Reberg-Horton

This study examined the impact of termination timing on cereal rye biomass across 4 North Carolina locations for 2 growing seasons. Termination times were 4 weeks before and at soybean planting. Biomass samples were collected to determine if delaying termination significantly impacted the biomass achieved by the cereal rye cover. Cereal rye biomass ranged from 1325.4 lbs/acre to 6006.5 lbs/acre across environments and treatments. Delaying termination (Green) resulted in significantly higher cereal rye biomass for only 3 of 8 environments. The remaining 5 environments saw no significant gain in biomass from delaying termination an additional 4 weeks. These results suggest that terminating cereal rye at soybean planting may not be necessary to maximize biomass in our Southeastern climate.

Soybean Hurricane Damage

By: Rachel Vann, Donald Stokes

This factsheet discusses the effect on soybean fields after a hurricane and how to proceed with production after extended rain or a flood.

Soybean Lightning Damage

By: Rachel Vann, Donald Stokes

This publication describes the symptoms of a lightning strike in soybeans in North Carolina.

Biomass Production With Legume and Small Grain Cover Crop Mixtures in North Carolina: Research Summary

By: Rachel Vann, Chris Reberg-Horton, Miguel Castillo, Steven Mirsky, Rebecca McGee

This publication discusses a study to compare five winter pea genotypes to crimson clover and hairy vetch for biomass production in mixture with various small grains.

Soybean Cold Damage

By: Rachel Vann, Donald Stokes

Cold damage in soybeans can emerge early or late in the season. This publication describes the symptoms and management of cold damage in soybeans in North Carolina.

Soybean Crusting

By: Rachel Vann, Donald Stokes

Soil crusting is a problem that can occur after soybean planting before the soybeans have emerged. This factsheet discusses the symptoms and management of soil crusting in North Carolina soybean production.

Soybean Sunscald

By: Rachel Vann, Donald Stokes

Sunscald is caused by bright sunlight on a wet leaf after exposure to high temperatures. Symptomology typically appears as rusty discoloration on the underside of leaves. This factsheet describes the symptoms and management of sunscald in soybean in North Carolina.