Determining Total Fertility In Strip-Tilled Fields

Band fertilizer placement may cause non-uniform distribution in the soil.

Why does this matter?

Because when fertilizer is unevenly distributed, it may not be possible to use traditional sampling strategies to measure whole-field fertility, said University of Illinois assistant professor of crop sciences Fabián Fernández. No recent published studies have looked at this problem.

Fernández has conducted research to determine potassium and phosphorous distribution in no-till and strip-till soils and to develop improved sampling procedures for measuring field fertility.

The problem, according to Fernández, is that fertility decreases between the rows but increases in the rows where the fertilizers are being banded. This would not be a problem if the location of the fertilizer band changed from year to year.

“Since the introduction of real-time kinematic (RTK) satellite navigation and the use of strip-till, farmers are always planting, and applying their band fertilizer, on exactly the same location,” he explained. “What happens is that all the fertilizer that was applied uniformly on the surface is now concentrated in a small fraction of the soil.” Because plant roots extend farther into the soil than just the small area where fertilizers are applied, fertility levels must be determined for the field as a whole to ensure that fertilizer applications are optimized to maximize crop yield and profitability.

Environmental issues are also involved. “If we are unable to determine the fertility of our field accurately because of the sampling method we are using, we may be applying more fertilizer than we need,” said Fernández. “A lot of the environmental issues have to do with phosphorus moving out of the fields as runoff from the soil surface.”

The study, conducted in Pesotum, IL., involved applying different rates of phosphorous/potassium blends in fall 2007 and 2009 before corn planting. Applications were broadcast-applied in no-till and strip-till and deep-banded at six inches below the surface in the crop row in strip-till. Fertilizer levels were measured every year at four-inch increments from the surface to a 12-inch depth, with samples collected at the row and at a distance of 7.5, 15, and 22.5 inches away from the row.

Results indicated that there was no need to adjust fertilizer rate based on tillage or fertilizer placement. Fernández explained that the plants send roots all over the soil profile, mostly in the surface layer, regardless of the fertilizer band. Thus, it does not really matter if fertility levels vary across the rows as long as the fertility level is sufficient for the crop.

What is important, however, is finding a way to estimate total field fertility when these differences occur. “The main message,” said Fernández, “is that for every time you take a sample where the fertilizer band is located, you need to take two or three samples outside of that band to make a composite sample to send off for analysis.”

This research, “Assessment of Soil Phosphorus and Potassium Following RTK-Guided Broadcast and Deep-Band Placement in Strip-Till and No-Till,” by Fabián Fernández and Daniel Schaefer, will be published in the May-June 2012 Soil Science Society of America Journal.

Leave a Reply

Fertilizer Stories

Sulfur Deficiency In Corn
Crop InputsManaging Sulfur Deficiency In Corn
January 6, 2017
Corn sulfur (S) deficiency is a growing problem in and across North Dakota, according to an article on the NDSU Read More
AFS Seed Retailer and Grower
Crop InputsThis Is Not Your Father’s World Of Nitrogen Management
January 6, 2017
Many of us older citizens can remember times when our fathers toiled day and night, to coax meager crop yields Read More
Young Corn Field
FertilizerPotassium Needs More Attention In Crop Nutrition
January 6, 2017
It’s well understood that plants require the right combination of the 14 essential mineral nutrients to sustain their growth, writes Read More
FertilizerSulfur: The 4th Major Nutrient
January 6, 2017
Sulfur is an essential nutrient in crop production. It is classified as a secondary element, along with Mg and Ca, Read More
Trending Articles
AgriSync
Matt Hopkins17 Agriculture Apps That Will Help You Farm Smarter In 2017
December 9, 2016
Ag professionals are working smarter, not harder, than ever before. Smart farming technologies have enabled them to reduce costs, maximize Read More
R4023 Sprayer, John Deere
CropLife 100Ag Retail Equipment Report: The Green Party Continues
December 7, 2016
In the annual race for sales in the ag retail equipment marketplace, the color schemes for participants are a little Read More
Mike Stern
Precision AgClimate Corp. CEO Talks Retailer Support For Digital Ag
December 1, 2016
CropLife Magazine’s sister publication, AgriBusiness Global, recently sat down with Mike Stern, CEO of The Climate Corp., following the Monsanto subsidiary’s Read More
Precision AgTrimble Debuts End-to-End FMIS Platform
November 28, 2016
October’s inaugural PrecisionAg Vision Conference left this author with many thoughts and things to ponder in the coming months. Probably Read More
CHS Primeland
CropLife 100The 2016 CropLife 100 Report: Reviewing The Many Bulls And Bears Impacting This Year’s Marketplace
November 28, 2016
For virtually all of 2016, the nation was wholly focused on the big Presidential election. Some folks aligned themselves with Read More
Monsanto sign
Crop InputsMissouri Governor Meets With Bayer CEO To Discuss Monsanto Merger
November 21, 2016
Missouri Gov. Jay Nixon visited Bayer AG global headquarters in Leverkusen, Germany, on November 18 to discuss the proposed Bayer-Monsanto Read More
Latest News
Eric SfiligojNo Alternative Facts: Dicamba Cropping System Applicato…
January 23, 2017
During President Donald Trump’s inauguration, much fuss was made over the use of the term “alternative facts” vs. some of Read More
Young Corn Plants
ManagementTimac Agro USA Acquires Michigan Ag Retailer
January 20, 2017
Timac Agro USA, an agriculture supply company specializing in high-efficiency plant and animal nutrition products, has acquired St. Louis,MI-based A&E Ag, Read More
Soybean field
Crop InputsNufarm Teams Up With John Deere Financial
January 19, 2017
Nufarm and John Deere Financial have teamed up to help farmers grow a better tomorrow. This program helps make purchases Read More
Sonny Perdue
LegislationTrump Formally Picks Perdue As Agriculture Secretary
January 19, 2017
U.S. President-elect Donald Trump officially announced Sonny Perdue as his choice for secretary of agriculture on Thursday, selecting a former Read More
ManagementPresident Trump, Wisconsin Review, and a Dow-DuPont Upd…
January 18, 2017
Editors Paul Schrimpf and Eric Sfiligoj reflect on a new administration, a recent winter show, and crop protection company mergers. Read More
Industry NewsBayer, MS Technologies Get China Approval For Balance G…
January 18, 2017
MS Technologies and Bayer have received import approval from China for Balance GT soybeans. The new Balance GT Soybean Performance Read More
Werner Baumann, Bayer AG, and Hugh Grant, Monsanto
Industry NewsReport: Monsanto, Bayer CEOs Among Latest to Make Trump…
January 18, 2017
The chief executive officers of German chemical giant Bayer AG and U.S. seed behemoth Monsanto, Werner Baumann and Hugh Grant, Read More
Giant Ragweed
HerbicidesStudy: Focusing On Weed Seedbank Can Help Manage Herbic…
January 18, 2017
Researchers writing in the latest issue of the journal Weed Science provide important insights on the control of herbicide-resistant giant Read More
Management3 Financial Trends To Watch In Agriculture
January 17, 2017
I recently had the opportunity to attend a meeting of credit managers for Midwest ag supply and input companies, in part Read More
Andersons Retail Store
CropLife 100The Andersons To Close All Retail Stores; Shutdown Does…
January 16, 2017
In a stunning announcement to the Toledo area, The Andersons Inc. said on Sunday that it would close its two Read More
Trimble TMX-2050 In-Cab Display
Eric SfiligojPrecision To Lead Agriculture In 2017?
January 16, 2017
Another new year is upon us! And I’m certain I speak for many in the agricultural world when I say Read More
Corn
Eric SfiligojThe Mood From Madison? In A Holding Pattern
January 16, 2017
Last week, I had the chance to attend the annual Wisconsin AgriBusiness Classic show in Madison, WI. It’s been a Read More
Syngenta Sign
Crop InputsAccenture Helps Syngenta Transform Its Global Logistics
January 13, 2017
Syngenta, a leading agriculture company, has collaborated with Accenture to design and implement a new digital logistics operating model across Read More
Fall Creek Seth Harden The Nature Conservancy
StewardshipLocal Farmers’ Watershed Initiative: Continuous Improve…
January 13, 2017
The goal in the Big Pine Watershed Project is to more intentionally do what local farmers and responsible ag retailers Read More
HerbicidesEPA Expands Enlist Duo Herbicide Registration To 34 Sta…
January 13, 2017
The U.S. EPA has expanded the geography for application of Enlist Duo herbicide from 15 to 34 states. This means Read More
Olson Ag Enterprise
CropLife 100Wilbur-Ellis Acquires Nebraska Seed Retailer
January 13, 2017
Wilbur-Ellis’ Agribusiness, a recognized leader in precision agriculture technology and the distribution and marketing of plant protection, seed and nutritional Read More
ManagementDeere-Precision Planting Update and the Ag Secretary Wa…
January 12, 2017
Editors Paul Schrimpf and Eric Sfiligoj provide the latest on the court date for John Deere/Precision Planting and the quest Read More
Monsanto sign
Seed/BiotechMonsanto, NRGene Form Agreement For Big Data Genomic An…
January 12, 2017
Monsanto Co. and NRGene have announced that the companies have reached a non-exclusive, multi-year global licensing agreement on NRGene’s genome-analysis Read More