Utilizing Growing Degree Units For Crop Management Decisions

Dwayne Beaty
Arkansas Crop Consultant: Corn
The use of Growing Degree Units is an effective tool in determining corn and rice management decisions. There are several apps available as well as websites and spreadsheets to calculate heat units. Growing Degree Units can be used to determine crop growth stages to make sure the crop is not past a growth stage cut-off deadline for herbicide applications. This tool is very useful but has to be "ground truthed" to determine accuracy. A very useful method of using GDU's is to determine corn fertilization timing.


Fertilizing Corn And Cotton In The Mid-South: Fact, Fiction, Or Fantasy

Dr. M. Wayne Ebelhar
Researcher Professor and Agronomist, MSU
Cotton and corn fertilization has been evaluated and continues to be evaluated across the Mid-south in an effort to decrease the unit cost of production. Many areas have shifted from a production system dominated by cotton to a grain based rotation with corn. Fertilizer requirements especially for nitrogen (N) is a much twice the requirement for cotton. Anhydrous ammonia has been replaced by granular urea (46-0-0) and urea-ammonium nitrate solution (28-32% N) for most crops. Several products have been introduced to "enhance" the efficiency of fertilizers while others have been touted to "regulate" biological transformations. Other the last several decades, research studies have evaluated sources, application timing, and various other aspects of fertilizer management. The overall goals of fertilizer management reside in the 4 R's of nutrient stewardship; the Right Source, applied at the Right Rate, Right Time, and the Right Place. These 4-R's promote best management practices to achieve cropping system goals while minimizing field nutrient loss and maximizing crop uptake (The Fertilizer Institute).


Corn Nitrogen Management In Central Louisiana

Dr. Daniel Fromme
Associate Professor - State Corn, Grain, Sorghum & Cotton Specialist, LSU AgCenter
The amount of nitrogen fertilizer needed for optimal corn yields in corn-soybean rotations should be established to enhance the agronomic, economic, and environmental sustainability of crops rotations in Louisiana. As the rotation of corn with soybeans has become a common practice in Louisiana, accounting for the residual N from the previous soybean crop will improve N fertilizer management and efficiencies for the subsequent corn crop.
Based on preliminary data, nitrogen rates of 175-200 pounds per acre are sufficient for corn following soybeans in central Louisiana.


My Experience And Comparison With 15", 30", And Twin Row 38" Corn

Perry Galloway
Arkansas Farmer: Corn, Soybeans, Rice, Wheat, Grain Sorghum
In 2016, Galloway planted twin row 38", 30", and 15" corn. He also had various planting populations within the 15" corn. 15" corn was harvested with a standard 30" corn head. He will present his observations from these and other experiences.
Galloway raises 2,500 acres corn, 3,000 acres soybeans, 900 acres rice, 875 acres wheat, and 500 acres grain sorghum in East Central Arkansas. He has been farming since 1992 and has received numerous awards for yield contest and challenges. He was also the National Conservation Systems Cotton And Rice Conference "Corn Farmer of Year" in 2015.


Corn Yield Losses Based On Strategic Defoliation

Dr. Clayton A. Hollier
Professor of Plant Pathology, LSU AgCenter
Artificial defoliation of corn leaves imitates the reduction or loss of the leafŐs ability to function in grain production. The defoliation can mimic disease expression, insect activity, hail, frost damage and other environmental influences on leaf health and function. This study mimicked these factors and measured the loss of yield and quality in two hybrids. Results will be presented.


Sugarcane Aphid Management In Sorghum

Dr. David Kerns
Professor, IPM Coordinator and Extension Entomology, Texas A&M AgriLife Extension
In 2013 the sugarcane aphid a new invasive pest of sorghum in North America, was confirmed on sorghum in four states and 38 counties In the U.S. in 2016, the aphid was reported on sorghum in 17 states and over 400 counties as well as all sorghum productions regions in Mexico. Managing sugarcane aphid in sorghum requires a fully integrated approach involving optimal planting dates, landscape management, hybrid selection, utilizing action thresholds, insecticide choice and efficacy, application technology, and multi-pest considerations along with natural enemy conservation.


Moisture Sensors Answer The Question: Do I Have Enough Moisture To Meet Crop Demand?

Trent Lamastus
Mississippi Consultant: Corn, Soybeans, Cotton, Wheat
With three years experience using moisture sensors on a wide range on crops and soil types, Trent is noticing a couple trends: "1. We typically can delay or eliminate early irrigation events. 2. During peak demand, often a rain or scheduled irrigation is not enough. 3. We are able to better determine when to terminate irrigation," he says.
Lamastus grew up on a farm in Sunflower County, Miss. He attended Delta State University where he earned a Bachelor of Science Degree in Biology with a minor in chemistry. While attending DSU, Trent worked for a crop consultant. He started his consulting business in 1993.


Knowns And Unknowns In Corn Production In The MidSouth

Harold Lambert
Louisiana Consultant: Corn, Soybeans, Cotton, Grain Sorghum, Wheat, Sugar Cane, Rice
There are fundamental procedures we know we have to do to produce a corn crop; there's also some procedures that we're not certain about, and research is needed in those areas. As a crop consultant, Lambert will expound on some of these ideas in his talk.
He has been an independent crop consultant for 35 years. He holds a bachelor's degree in agronomy and a master's in entomology from LSU. He's a Certified Professional Agronomist and Board Certified Entomologist; and a member of the National Alliance of Independent Crop Consultants and the Louisiana Agricultural Consultants Association.


Critical Areas To Improve Mid-South Corn Yields

Dr. Erick Larson
State Extension Corn Specialist, MSU
Producers in the Mid-south corn are blessed with much higher annual rainfall than the Corn Belt and areas where highest corn yields are typically achieved. However, this abundant rainfall during the growing season provides some of our most substantial management challenges which limit corn productivity. For example, rainfall during the early spring restricts and delays planting, contributes to stand failure, and encourages soil compaction. Furthermore, excessive moisture during the growing season will stunt root and crop development, escalate nutrient loss, and promote other issues. This presentation will help describe how to improve plant-water relations in order to improve crop productivity. Understanding how these variables interact with the crop, we will explore various management options, including irrigation scheduling and other management factors, which offer potential to enhance corn productivity or reduce risk associated with the environmental conditions common in this region.


What I Learned From Season - Long Tissue Sampling Corn And Emergence Using The Randy Dowdy Flag Test

Cecil Parker
Louisiana Consultant & Research Hobby Farmer: Corn, Cotton, soybeans, Alfalfa, Wheat, Rice, Sweet Corn and Milo
While Parker has advised farmers in tissue sampling for some time, it's only the past year that he's recommended it as a season-long process for corn. He recommends season-long sampling once a week from the time the corn has 5-6 true leaves on it up until the time of black layer.
Parker consults with about 40 farmers on all the crops raised in North East Louisiana. He has had a computer and printer in truck for the past 15 years utilizing software to track field data by year, generate and print email reports from the truck to his clients. He also uses handheld Trimble Nomads with GPS which allows him to mark suspected resistant weeds, insect problem areas and poor growth areas caused from nematodes, missed water furrows and fertility.

He also farms and raises cattle and horses, growing 25 acres of sweet corn, 60 acres of contract research on cotton and soybeans, 200 acres each of corn and soybeans. He holds a Bachelor of Science degree in agronomy, specializing in pest management from Louisiana Tech University at Ruston, LA. He has been consulting since 1985 and farming since 1986.


A Fresh Look At Nitrogen Management In Corn

Dr. Trenton L. Roberts
Extension Soil Fertility Specialist, University of Arkansas
Nitrogen management in corn revolves around maximal yield potential which can be achieved with many different N management strategies. However, recent research suggests that the biggest return on N inputs can be gained by moving more N from preplant applications and applying in-season. Preplant N uptake in corn is very inefficient and N fertilizer can provide more yield response when applied later in the growing season when N uptake efficiency is much higher.


Nitrogen Management Through The Use Of Y-Drops

Luke Sayes
Louisiana Farmer: Corn, Soybeans, Cotton
In his first year of using Y-Drops for topdressing nitrogen, Sayes reports some great changes when used on marginal land. The system, which consists of attaching Y-Drops on a regular spray rig, has been in use in the Midwest for a couple of years.
He raises 1,000 acres of corn, 3.500 acres of soybeans, and 750 acres of cotton alongside his father in Avoyelles and Catahoula parishes. He has been farming for 11 years and grew up on the farm. Sayes holds a bachelorŐs degree in general studies from Louisiana State University at Alexandria.