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
July 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
Southeast Farmers Coop - Finished Building
Retail FacilitiesNew Stueve Facilities Offer Ag Retailers Speed, Accuracy
July 9, 2016
Leading the industry in planning and constructing dry fertilizer storage and chemical warehouse solutions, Stueve Construction helped three ag retailers Read More
Heritage Cooperative
Retail FacilitiesKahler Automation Designs State-Of-The-Art Facility For Heritage Cooperative
July 4, 2016
Heritage Cooperative in Marysville, OH, needed an efficient liquid, dry and grain facility to serve the many needs of their Read More
The Andersons Waterloo
ManagementFirst Indiana Facility Certified Under 4R Nutrient Stewardship Certification Program
June 27, 2016
The 4R Nutrient Stewardship Certification Program has announced that The Andersons, Inc.’s Waterloo, IN, facility has been added to its Read More
Food IT
Industry NewsCalifornia Event Will Mix Ag And Tech Professionals To Explore IT Solutions
June 20, 2016
Silicon Valley is hot on agriculture, and an upcoming event in California will bring together the food and tech industries Read More
Monsanto Luling Plant
Eric SfiligojWhat’s Next For Monsanto?
May 31, 2016
For the folks at Monsanto’s headquarters in St. Louis, MO, it has been an eventful few weeks. Back on May Read More
Soybean Plant closeup
Industry NewsMonsanto Rejects Bayer Bid; Open To More Talks
May 25, 2016
Monsanto Co, the world’s largest seed company, turned down Bayer AG’s $62 billion acquisition bid as “incomplete and financially inadequate” Read More
Latest News
FertilizerGypsum Added To List Of Conservation Practices
July 28, 2016
Crop farmers in a growing number of states may be eligible for financial assistance from the USDA’s Natural Resources Conservation Read More
Management2016 CTIC Cover Crop Survey: 33% Report ROI From Cover …
July 28, 2016
Insight from 2,020 farmers from across the country reflected enthusiasm for cover crops and—for the fourth year in a row—found Read More
Palmer pigweed seedhead in cotton
HerbicidesStudy: Fall Weed Controls Can Make Significant Impact O…
July 28, 2016
An article published in the latest issue of the journal Weed Science shows that adopting harvest-time and post-harvest weed controls Read More
InsecticidesSyngenta: Beware Of Early Stinkbug Threat To Soybeans
July 28, 2016
With the record warm temperatures this past winter and confirmations from early entomologist reports, Syngenta encourages growers to monitor stinkbug Read More
Peanut field
Crop InputsVerdesian Introduces New Inoculant For Peanuts
July 28, 2016
As planning begins for the next growing season, Verdesian Life Sciences adds Primo Power CL, a new liquid inoculant, to Read More
Soil Young Corn
Crop InputsSmithsonian: 5 Things to Know About New GMO Labeling Bi…
July 27, 2016
On July 14, the House of Representatives passed a bill requiring large food companies to label products containing genetically modified Read More
Palmer pigweed in soybean stubble
HerbicidesSpecial Issue Of Weed Science Explores Human Aspects Of…
July 27, 2016
Weeds that evolve resistance to herbicides are a serious threat to global agricultural production. In this Special Issue of Weed Science, Read More
CHS Primeland
CropLife 100CHS Businesses In Washington, Idaho Combining For Great…
July 27, 2016
As full-service ag retailers, CHS Primeland and CHS Farmers Co-op collectively serve farmers and other customers in 15 counties in Read More
Storage Tanks at Nachurs
Crop InputsNACHURS Joins Field to Market
July 27, 2016
NACHURS announced today that it has joined Field to Market: The Alliance for Sustainable Agriculture, a leading multi-stakeholder initiative working Read More
Illinois Researchers
FertilizerMeasure Of Age In Soil Nitrogen Could Help Precision Ag…
July 26, 2016
What’s good for crops is not always good for the environment. Nitrogen, a key nutrient for plants, can cause problems Read More
Kochia
Crop InputsNufarm Launches New Herbicide for Resistant Kochia
July 25, 2016
Nufarm introduces Scorch herbicide for U.S. farmers and ranchers combating a broad range of troublesome broadleaf weeds. A unique premix Read More
ManagementNew Rabobank Report Calls for Farmer ROI Focus
July 25, 2016
As U.S. row crop farmers brace themselves for a third year of negative margins, Rabobank believes farmers must lower the Read More
Syngenta Sign
Crop InputsBloomberg: Syngenta-Chem China Deal on Track for Regula…
July 25, 2016
Syngenta AG, which has agreed to be taken over by China National Chemical Corp. for $43 billion, said talks with Read More
ManagementGROWMARK Meeting Visit, Company Takeover Updates, and R…
July 22, 2016
Editors Paul Schrimpf and Eric Sfiligoj discuss their recent speaking engagement at GROWMARK’s eastern event, crop protection company merger rumors, Read More
Crop InputsMonsanto: EU Approves Roundup Ready 2 Xtend Imports
July 22, 2016
Monsanto Co. announced today that the European Commission has granted import approval for Roundup Ready 2 Xtend soybeans. This milestone Read More
Syngenta headquarters in Basel, Switzerland
Crop InputsSyngenta Announces Alfalfa Seed Split Off
July 22, 2016
On September 1, 2016, Syngenta will transfer sales and distribution of alfalfa seed to the NEXGROW branded business that is Read More
Dow DuPont
Crop InputsDuPont, Dow Shareholders Approve Merger
July 21, 2016
DuPont and The Dow Chemical Company announced that, at their respective special meetings of stockholders held today, stockholders of both Read More
ManagementLand O’Lakes Announces SUSTAIN Business Unit, Oth…
July 20, 2016
Land O’Lakes, Inc. today announced the formal organization of a new business unit, SUSTAIN, and its leadership. SUSTAIN will focus Read More