Soil Sampling: The New, Old Way

Solum's Wet K Process Machines
Solum’s Wet K Process Machines

This year, Solum Inc. is officially launching its new wet potassium (K) soil testing process to the industry. In a nutshell, this will allow customers to have their soils tested for K content in a wet slurry rather than the near bone dry mixtures usually used for this procedure.

And when you consider all the factors, says Nick Koshnick, co-founder and CEO of Solum, it makes perfect sense to use a wet method to accurately test K levels in soil samples. “Crops live in field moist soil,” says Koshnick. “They don’t live in baked, pulverized soil – unless they are growing somewhere in Arizona.”

Despite this fact, the ag industry’s accepted method of K soil sampling has used dried soil. In this process, lab technicians take a soil sample, dry it in an oven for six to 12 hours and crush it into a fine powder. They then take a sub-sample of this mixture, add chemical re-agents to extract plant available nutrients, and then measure the amount of the extracted nutrients.

Unfortunately, says Koshnick, these final results can sometimes give artificially higher K readings. “If you have a soil sample that has a lot of clay in it, there might be quite of bit of K stuck in those inter-layers,” he says. “Heating and crushing will release this into the general sample and could give a higher K reading then is actually plant available. For the customer, the most useful reading from the soil sample is the K that can actually be taken up by the growing plant. When the soil processing artificially increases or decreases the measured K values, it decreases your ability to accurately predict when the crop will respond to applied potash.”

A Wet History

In truth, says Koshnick, soil researchers have known about this “changing K possibility” for heated samples since the late 1950s. And for many years, soil sampling labs such as the one at Iowa State University (ISU) did offer a wet K soil sampling process as an alternative. However, performing wet K sampling at this time proved to be ultimately more expensive/time-consuming than dry sampling, so the university discontinued its wet K testing program back in 1988.

But according to Koshnick, wet K sampling was in many ways a superior soil testing method compared with dry. “The whole concept of field moist processing was to measure the soil sample as close to field conditions as possible,” he says. “That was something I agreed with.”

So, when Solum began operation a few years ago, Koshnick saw an opportunity to return wet K soil sampling to the mix. “K was something that many people didn’t really put a lot of attention into, but research has shown that an adequate supply of it in the soil can increase yields dramatically,” he says. “Given how important increasing yields have become in agriculture over the past few years, I thought it made sense to look for better ways to determine K levels for the end users.”

The Solum team then spent several months designing and building automated machines specially built to handle wet K soil sampling, which they used to measure commercial soil this past fall. “These machines ran 18 hours per day processing samples for our customers,” says Koshnick. “And we are building the next generation of machines right now.”

The Wet K Method

To conduct its wet K soil sampling method, Solum researchers receive a soil sample from a customer at the company’s Ames, IA, facility. These are marked with radio-frequency identification tags and then lightly blended to get a sub-samples for testing. “The sub-sample is first tested for its moisture content,” says Koshnick. “Researchers then add water to the sub-sample and it goes into one of our testing units. They then do some chemical extracting of the sample to get a proper K reading.” In total, he adds, this whole process allows Solum to turn around the soil sample for its customers in one to three business days.

During 2013, Koshnick expects many customers interested in getting an accurate reading on their K soil levels will come to Solum for help. “I remember talking with someone at ISU and them telling me that dropping wet K soil sampling from their agricultural offerings back in 1988 ‘was a big mistake,’” he says. “Now, using our resources, we can again offer the industry this important method for determining K levels in our soils.”

Leave a Reply

Equipment Stories

AGCO Custom applicator
SprayersAGCO, Asmark Institute To Offer Training For Beginning Custom Applicators
January 11, 2017
AGCO Corp. and the Asmark Institute are collaborating to offer a new training program dedicated to educating and developing custom Read More
RoGator RG1300B AGCO
Sprayers10 Sprayers That Will Showcase The Latest Application Technology In 2017
January 10, 2017
Sprayer manufacturers continue to step up their games with the latest in application technology. From direct injection systems and four-wheel Read More
The Sackett-Waconia Baltimore manufacturing facility in Baltimore, MD.
BlendersA.J. Sackett & Sons, Waconia Manufacturing Join Forces
January 4, 2017
Since 1995, A.J. Sackett & Sons and Waconia Manufacturing have been linked as partners and leaders in providing engineering and Read More
Farmobile Dashboard Heat Map
Precision AgFarmobile’s EFR Dashboard Brings Real-Time Metrics To The Coffee Table
January 1, 2017
Farmobile is one of many data start-ups that we’ve been closely observing with a sense of keen curiosity since they 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
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
AGCO Custom applicator
SprayersAGCO, Asmark Institute To Offer Training For Beginning …
January 11, 2017
AGCO Corp. and the Asmark Institute are collaborating to offer a new training program dedicated to educating and developing custom Read More
ManagementAg Land Values In Limbo In 2017
January 10, 2017
Several factors will come into play in 2017 that will determine the direction of land values. Randy Dickhut, senior vice Read More