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Calculating Fertilizer Application Rates from Your TPSL® Soil Test Report

This Soil Sample Guide from TPS Lab illustrates soil depths for reference to plant roots and gives step-by-step instructions for how to take a soil sample for soil testing.

Two weeks ago the Iowa lawmakers voted to eliminate sustainable agriculture research center by removing funding for the Leopold Center for Sustainable Agriculture at Iowa State University.

Wednesday, 31 May 2017 07:21

Learn More about our Soil Testing Method

Why should I have my soil tested?

A pre-plant soil test will tell you what fertilizers you need to apply to get your plants off to a good start by providing them with proper soil fertility at planting.

Wednesday, 31 May 2017 07:21

TPS Lab's New Mascot Is Here

TPS Lab's plant mascot, an Amorphophallus titanum, has finally arrived!

Wednesday, 31 May 2017 07:18

TPS Lab Grape Specific Testing

TPS Lab is getting a lot of soil samples recently from vineyards of all sizes and ambition. TPS Lab has stirred up a lot of interest with Viticulturists with the recent introduction of our grape specific soil test and grape specific plant test, addressing the special nutritional and testing requirements of grapes.

TPS Lab’s Vice-President of Research, Larry Zibilske, PhD, has written a paper, “SILICON - The "Miracle" Trace Element?”

You may download the paper in our PDF form.

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