TP&S LabThe TP&S Lab Method
Making Crops Greater for Growers Around the World Since 1938.
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TP&S Lab Blog
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Category: Blog
Texas Plant and Soil Lab welcomes new customers and test samples from all around the world. This last month we have had samples and tests from the following places for the following crops: • From Mexico, we received plant samples for broccoli, garlic, mustard, onion and turnip. • From Mexico, the lab received fertilizer samples […]
Thu, 29 Jan 2015 21:36:33 +0000

Category: Blog
The secret to TP&S Lab’s success is our proprietary plant nutritional standards, which have been continuously updated since standards were initially published in the early 1950s – standards under which, most labs (whether private or institutional) still operate. Our ever-dynamic standards accommodate generally-declining soil conditions and new crop varieties – among other things. After all […]
Thu, 22 Jan 2015 21:26:42 +0000

Category: Blog
We’re running a skeleton crew today to keep all lab testing processing on time even during the New Year’s Holiday week. We will be closed Thursday, January 1st so that our families and yours can spend time celebrating the New Year. Business-day turn-around times on all testing should remain consistent. Here’s a great picture from […]
Tue, 30 Dec 2014 18:46:48 +0000

Category: Blog
Happy Monday from TP&S Lab! We’ve got a skeleton crew running this week, so we can keep all of your soil testing, your plant testing – all lab testing – running on schedule. We’ll be closed Thursday, January 1st for New Year’s Day and back in the lab with a skeleton crew on Friday, January […]
Mon, 29 Dec 2014 16:24:50 +0000

Our Method

TP&S Lab uses the CO2 Extraction Method to extract Potassium (K), Sodium (Na), Calcium (Ca), and Magnesium (Mg) from your soil. This method duplicates the way plants naturally extract these nutrients from ANY soil. TP&S Lab has been testing soils from around the world and providing solutions for growers for more than 70 years.

The CO2 Extraction Method is offered only by a handful of labs around the world, as it is extremely labor-intensive and does not lend itself to an automated processing line as does Mehlich III or other commonly-offered soil nutrition tests.

Other testing methods only tell you the TOTAL CONTENT of Potassium (K), Sodium (Na), Calcium (Ca), and Magnesium (Mg) present. The CO2 Method seprately tells you what is immediately available to the plant (water soluble) and what is
"in reserve" as a locked-up compound (generally unavailable).

This explains why a more standard test may show certain nutrients as adequate or high, yet the plants show deficiencies in those nutrients - and why you may see the same test results, year after year.

Because our method duplicates the way the plant naturally extracts nutrients, it is the most accurate method of measuring Potassium (K), Sodium (Na), Calcium (Ca), and Magnesium (Mg). It does not have to be adjusted according to soil type. The proof is always in crop / plant performance!

CO2 was the first soil nutrient extraction method, develpoed in England by Daubeny in 1845. As analytical technology improved, much work was done on the method by the universities of Arizona and Florida and others in the 20th Century. Building upon those works, TP&S Lab has further developed and refined the testing standards.

But the real value in a TP&S Lab test is in the recommendation. You get a specific fertilzation recommendations for your crop in your soil based on your cultivation practice, whether CONVENTIONAL, SUSTAINABLE, or ORGANIC.

Please contact us today at 956-383-0739 and speak with us
about your needs.

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TP&S Lab is proud to be a member of the Texas Ag Industries Association.
Texas Wine & Grape Growers Association
TP&S Lab is proud to be a member of the Texas Wine and Grape Growers Association.
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TP&S Lab is proud to be an approved Lab by the U.S. Composting Council for Seal of Testing Assurance.
TP&S Lab is proud to be a member of the American Society for
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