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University Crop Yield Studies

Here you will find experiments performed by universities throughout the United States.

Planters Calcium vs. Standard Calcium
The University of Arizona took calcium deficient plants and added "standard" trace mineral calcium to one group, and Planters II calcium to the other group. They found that while standard trace calcium helps, it is not plant available like Planters II calcium. The Planters II calcium nearly doubled the growth rate.

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