Webinar: Phosphorus Efficiency Takes Center Stage

Phosphorus (P) is an essential element for early crop growth and root development, however, producers face many challenges managing P in the soil. A recent CropLife Media Group Webinar, “The Great Tie-Up: Phosphorus vs. Your Soil,� presented by sponsor SFP, analyzed the interaction between P and different soil elements, as well as identified ways to improve this important relationship.

Attendees of the Webinar viewed presentations by Dale Leikam, Ph.D., president, Leikam AgroMax, describing the dynamic relationship between P and other elements in the soil, and by Jeff Thompson, regional manager, Iowa, explaining research trials and data with AVAIL Phosphorus Fertilizer Enhancer.

Phosphorus Deficiencies

To begin his presentation, Leikam discussed P deficiencies and cautioned attendees most P deficiency symptoms, today, aren’t readily evident by just visually examining crops.

Historically, P and other nutrient deficiencies have been diagnosed primarily via soil test values or a “visual deficiency symptom being observed.� According to Leikam, this is one approach to crop input management that needs to change.

Leikam also made a clear distinction between nutrient availability and nutrient uptake. “They are not the same thing,� says Leikam. “Frequently, when people talk about nutrient availability, many times they are talking about soil test values, and they talk about it as being the availability of that nutrient to the crop, and it may be true in a general sense, but it has nothing to do with the plant’s ability to take up these nutrients. There are many factors affecting nutrient uptake.�

Leikam says moving forward, growers and agronomists need to keep in mind nutrient demand per acre, on a per day basis during critical stages of crop development, as opposed to just relying on soil test results for P.

“The greatest demand for P by the crop, per unit length of roots, occurs very early in the season,� says Leikam. “Right after the crop has used up all the nutrients from the seed, it has a small, little root system and now it has to depend on the soil for nutrients. It’s a critical time for phosphorus nutrition.�

As growers continue to press yields and plant populations higher, one concern is the smaller root system these plants have, per bushel of production, in comparison to crops grown in fields with lower yield potential, notes Leikam.

Another factor to consider is P soil chemistry is “more complex than for other nutrients,� according to Leikam. “When we add P fertilizer to the soil, it reacts with soil cations, like calcium and magnesium, and reverts to much less soluble forms of P,� he says.

Banded applications of P have many advantages in improving nutrient availability to the plant, including:

  • Minimizes initial contact with soil “impurities.â€�
  • Reduces soil contact, which increases solution P.
  • Delays P “fixationâ€� due to reduced soil contact.

AVAIL Advantages

Building on P management, Thompson explained that using AVAIL can increase P availability and presented several slides detailing AVAIL trials conducted in Iowa, as well as other geographical regions throughout the country.

A 2012 Calhoun County, IA, study showed the difference between corn acres treated with standard DAP and DAP treated with AVAIL. “With the ability to take up more phosphorus early in the plant’s life, you can really see the difference between the AVAIL-treated DAP and the untreated,� he says. “You see larger root systems, a bigger plant and more uniformity across the field.�

In a summary of 208 AVAIL corn trials conducted between 2005-2012, including both granular and liquid applications, AVAIL showed an average 9.8 Bu./A yield increase, or a 5.8% average yield increase, according to Thompson.

Another study summary, this one aggregating 13 on-farm corn trials conducted 2005-2010 on fall-applied P treated with AVAIL, showed an average yield increase of 8 Bu./A.

Leave a Reply

Webinars Stories

WebinarsWebinar Schedule
April 14, 2016
Register for one of our upcoming Webinars or access our archive of past Webinars to view recordings of presentations that may be of interest to you. Read More
Webinars5 Key Benefits Of Attending A Webinar
September 2, 2014
Webinars can provide ag retailers with a convenient option for gaining knowledge on the latest industry issues and solutions. Read More
WebinarsEnhanced Nutrition For High-Yield Corn
April 1, 2014
Improved fertility for high-yield corn requires a better understanding of nutrient demands at critical growth stages and enhanced efficiency of applied nutrients. Read More
Trending Articles
Eric SfiligojReasons For Hope In Commodity Prices
May 2, 2016
For many months now, the doomsayers have ruled the day in agriculture. Too much supply with too little demand would Read More
Eric SfiligojMissing The Family Ties In Agriculture
April 25, 2016
By its nature, the agriculture market is cyclical. Up and down cycles come and go with a regular pattern. For Read More
HerbicidesHerbicide Resistance In Waterhemp Continues To Grow
April 22, 2016
Twenty-five years ago, waterhemp was virtually unknown to Illinois farmers. Today, the broadleaf weed blankets corn and soybean fields across Read More
Eric SfiligojBiotech Corn Drop More Economics Vs. Consumer Rejection
April 18, 2016
Since their introduction into the agricultural marketplace, biotech crops has steadily grown in acreage in the countries of the world Read More
Crop InputsBayer: 5 Reasons We Disagree With Maryland Neonic Ban
April 12, 2016
We’re disappointed that the Maryland legislature chose not to stand up for sound science and the rights of Maryland’s homeowners Read More
Corn
OpinionChallenging Global Economic Conditions Putting More Heat On U.S. Ag Retailers
April 7, 2016
There it is. That vague, slightly sickening feeling in the pit of my stomach. Things are getting weird out there. Read More
Latest News
Industry NewsHELM AGRO Adds New Marketing & Business Development…
May 4, 2016
HELM AGRO US, Inc. has announced the hiring of Troy Bettner as the company’s new Marketing & Business Development Leader. Bettner Read More
Palmer amaranth in soybean stubble
HerbicidesWSSA: Billions In Potential Economic Losses From Uncont…
May 4, 2016
What losses would corn and soybean growers experience if they were forced to eliminate herbicides and other control techniques from Read More
Spray Drift
HerbicidesRoundup Ready Xtend: Silver Linings In Label Delays For…
May 4, 2016
Since 2014, Monsanto has trained more than 20,000 growers and retailers on all aspects of its new dicamba-tolerant system at Read More
Syngenta headquarters in Basel, Switzerland
Crop InputsSyngenta Board Appoints New CEO
May 4, 2016
Syngenta announced today the appointment of J. Erik Fyrwald, currently President and CEO of the U.S. chemistry distribution company Univar Read More
Crop InputsIntrexon Establishes Crop Protection Enterprise
May 4, 2016
Intrexon Corp., a leader in synthetic biology, has announced the formation of Intrexon Crop Protection (ICP), a wholly-owned subsidiary dedicated to Read More
Patriot 4440 Sprayer close up
ManagementFlashing Back And Moving Forward On Spray Drift
May 3, 2016
The potential for pesticide drift remains an unavoidable feature of modern agriculture. Here, too, history repeats itself. “When Roundup debuted, Read More
Giant Ragweed
HerbicidesSurvey Provides Insights On Giant Ragweed In The Corn B…
May 2, 2016
A new survey published in the journal Weed Science offers insights into the distribution and management of giant ragweed, a Read More
Truck dumping dry fertilizer
FertilizerFertilizer Logistics Q&A: Southern States’ Joe Wlod…
May 2, 2016
Joe Wlodkoski, Director of Agronomy Procurement, Fertilizer, Southern States Cooperative, is a 40-plus year fertilizer industry veteran. He is quite Read More
Eric SfiligojReasons For Hope In Commodity Prices
May 2, 2016
For many months now, the doomsayers have ruled the day in agriculture. Too much supply with too little demand would Read More
West Central Dome structure
FertilizerFertilizer Logistics 2016: All Clear, So Far
May 1, 2016
After a relatively hairy early start to the spring fertilizer movement season with flooding in Louisiana and St. Louis, things Read More
BAICOR
CropLife 100BRANDT Acquires Utah Specialty Fertilizer Company
April 28, 2016
BRANDT, a leading agriculture retailer and manufacturer of specialty ag products, has acquired a majority interest in BAICOR, L.C. BAICOR, Read More
Soybean field
Industry NewsVerdesian Life Sciences Adds Vice President Of Business…
April 28, 2016
Verdesian Life Sciences has announced the addition of Marc Treurniet to the plant health and nutrition company’s management team. Treurniet Read More
ManagementBiotech Crops Developments and Millennials
April 28, 2016
Editors Eric Sfiligoj and Paul Schrimpf talk about the latest activities in biotech crops and a major shift in the Read More
Industry NewsNachurs-Alpine, Pathway Biologic Extend Marketing Agree…
April 28, 2016
Nachurs-Alpine Solutions (Marion, OH) and Pathway Biologic (Plant City, FL) announce an extension to their exclusive marketing agreement specific to Read More
MicronutrientsCharah Add Three Warehouses For SUL4R-PLUS Fertilizer
April 28, 2016
Charah, Inc., a total solutions company providing unparalleled service and innovation for the coal-fired power generation industry, announced today that Read More
Spenser Forgey, Yahama Fortix
FungicidesIndiana Farmer Wins Arysta LifeScience FORTIX Fungicide…
April 28, 2016
Arysta LifeScience North America recently presented Spenser Forgey, a grower from Young America, IN, with a new 2016 Yamaha Grizzly Read More
Corn Field
HerbicidesNew Wilbur‐Ellis Herbicide Targets Volunteer Corn
April 28, 2016
Wilbur‐Ellis Co., a recognized leader in marketing and distribution of crop protection products, as well as precision agriculture technology, has Read More
StewardshipNRCS To Help Farmers Measure Conservation Impacts On Wa…
April 27, 2016
The USDA has announced the availability of $2 million to help farmers install edge-of-field stations that monitor water quality as Read More