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| Looks like lime and sulfur mostly, though sulfur will tend to lower pH while lime increases it.
For most recorded history Iowa has said sulfur was not needed to be added (Iowa coals were high sulfur, but are not longer mined or burned). In the last couple years ISU is saying they are seeing crop responses to sulfur sometimes, but finding no correlation between the crop responses and the soil tests.
In my field tests for the effects of high calcium tying up P and K my tenant also applied extra AMS with the extra P and K and the seed vendor is interested in the crop response so helped pull tissue samples last week. So far there's no visual difference through tasseling from normal, 1.5 and 2x applications of AMS, P, and K in the field. E.g. I can't find the strips walking the field. The seed agronomist is seeing signs of shortages of S in other fields, pale strips in the leaves.
Gerald J. | |
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A soil sample result. Just because.
