ADDRESSING CORN PRODUCTION MANAGEMENT WITH INPUT OPTIMAZATION
Presented by: Dr. M. Wayne Ebelhar (Retired)
Soil Fertility/Crop Production, Mississippi State University Delta Research & Extension Center
The various inputs to corn production have been examined over the last few decades and grain yields have increased from around 50 bu/acre to 180+ bu/acre. The gains in grain yield have been attributed to better genetics (hybrids), increased fertility, better disease and insect control, higher plant populations and sound management decisions. Producers often believe more is better but that is not always the case and the maximum economic yield (MEY) may be different from maximum yield alone. AS inputs increase, net returns tend to decrease per unit. This law of diminishing returns states that in all productive processes, adding more of one factor of production, while holding all others constant (“ceteris paribus“), will at some point yield lower incremental per-unit returns. The law of diminishing returns does not imply that adding more of a factor will decrease the total production, a condition known as negative returns, though in fact this is common.
The research being discussed examines both the addition and deletion of inputs that producers often trigger without scouting or determining the economic implications. This research project was sponsored in part by the Mississippi Corn Promotion Board and the producers of Mississippi. Factors considered included plant population, row configuration, nitrogen rate, phosphorus and potassium application, sulfur, zinc, and fungicide application. Decisions were made without reference to soil testing or scouting. The research techniques included a split plot design with combinations of seeding rate and row configuration as the whole plot and the other factors as subplots with four replications. The research includes both and evaluation of additive effectives and omission effects.
Silent Shade Corn Production
Presented by: Dr. Richard Turner
Agronomist, Silent Shade Planting Co.
Corn is one of four major crops grown in rotation with cotton on Silent Shade Planting Company in Belzoni, MS. Predicted corn acreage was reduced (1300 acres) when compared to intended (3000 acres) due to lack of favorable planting conditions in the optimum corn planting date window. Efforts are made to optimize yield through use of multiple mode of action herbicide program, adequate planting population, variety placement, proper fertility, tillage, use of fungicide, and nitrogen stabilizer. Average yields will be discussed along with anticipated changes for the 2021 growing season.
Making the Most of Corn Planting Opportunities
Presented by: Dr. Erick Larson
State Corn Specialist, Mississippi State University
Mid-South growers usually have plentiful spring rainfall which limits planting opportunities and stress plant development, but the spring of 2020 was extraordinarily challenging for corn growers. It is also well documented that corn is very responsive to early planting, which puts pressure on us to plant when conditions are far from ideal, or abandon corn growing intentions altogether. However, successfully growing corn depends on numerous factors that interact to ultimately determine the stand, plant health and the resources available to grow a productive and profitable corn crop. We will explain how various factors influence crop development, and offer management recommendations which enhance productivity or reduce risk associated with common limitations and issues encountered in this region.
How Computerized Hole Selection Aids With Corn Production
Presented by: Will Hart
Mississippi Farmer: Corn, Soybeans
Will Hart will offer his experiences with computerized hole selection in corn production. He will discuss the implementation of the system, the benefits it offers, as well as the other irrigation technologies that become available once this tool is used.
Hart attended Mississippi State University where he studied Agricultural Engineering and Technology Business. A lifelong farmer, he works for his grandfather, Terry Maxwell, on Hopeso Farms which includes 3,000 acres with one third dedicated to corn and the other two thirds to soybean production.
Glyphosate-Resistant Grass Management in Corn
Presented by: Dr. Larry Steckel
Extension/Research Weed Scientist, University of Tennessee
Presented by: Clay Perkins
Graduate Student, University of Tennessee
Glyphosate has been the primary herbicide in corn to address johnsongrass infestations since the advent of Roundup Ready corn hybrids. However, in recent years University of Tennessee Extension has received numerous reports of johnsongrass, goosegrass and junglerice surviving often multiple applications of glyphosate. In particular, johnsongrass has become more problematic in corn. The beginning of this was in 2015 when populations from Tipton county were found to be 2 to 3 times more resistant to glyphosate than a susceptible population Since 2015, GR johnsongrass has becoming increasingly abundant in many counties across Tennessee. Due to the development of glyphosate resistance, johnsongrass is in the process of becoming the primary weed problem in our state’s corn production once again. Changes in weed management are now clearly needed in corn to address the increasing issues of GR grass weed species.
Cover Crops and Crop Rotations in Mississippi Corn Production
Presented by: Dr. Justin McCoy
Assistant Professor Agronomy, N. Mississippi Research & Extension Center, Mississippi State University
Presented by: Jack Huerkamp
Mississippi Farmer: Corn, Cotton
Means to improve corn production practices through crop rotation and cover crop systems exist, but implementing these strategies in mid-southern corn production can be challenging. The objective of this session is to discuss practical applications for cover crops and crop rotational strategies in Mississippi corn production systems.
Huerkamp is a third generation farmer. He’s been farming on his own since 1978, and holds a bachelor’s degree in Ag Economics from Mississippi State. He raises 450 acres of corn and 650 acres of cotton.