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Central Missouri | The way to figure out if your soils are cobalt deficient is to send soybean samples into a lab and have tissue analysis done for cobalt. I’d bet that the vast majority are deficient. Ideal is 3-4 ppm. Ive seen alot of .07’s from alot of locations.
We are in the 70-80 percentile of cobalt on the map in one of the papers Dr Joel referenced yet we are woefully short of cobalt.
I used cobalt as the example in the op because the referenced paper points out well how eliminating most limiting nutrients increases plant tissue content of other nutrients without applying any of them.
Edited by ehoff 1/19/2026 15:55
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The box I’m stuck stuck in. The plant nutrition box.
