Pat Rogers

  • Pat And Blake Rogers Farms

  • United States, SC, Blenheim

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Pat Rogers Blenheim, SC
3 years, 7 months ago
from Fertility And Soils
How much do you think the source of K matters in sustainable crop production? There seems to be some argument as to whether or not KCl is bad for soil microorganisms but the alternative of SOP or KMag is just so expensive. Any thoughts or experiences? @Marc Suderman @Curt Livesay @Steven Harrelson @Buz Kloot
Curt Livesay West Branch, IA
3 years, 7 months ago from Fertility And Soils

Yes. I'll weigh in on this and the manganese question someone asked like 2 weeks ago a little later today. Gotta go feed my baby boy :)

Curt Livesay West Branch, IA
3 years, 7 months ago from Fertility And Soils

I believe that the source of K is actually incredibly important. EVERYONE should read the article called, "The potassium paradox" by Khan, Mulvaney and Ellsworth from the U of IL. (Linked below). The short version is that they conducted a meta-analysis of over 2000 published research articles and about 3/4 of the time there's no yield benefit to KCL. In the 24% of the time when there was a benefit it met one of three conditions:[br]1. Sandy Soils naturally low in K[br]2. Stover removal (and the K was obviously removed with that, thus quickly depleting soils.[br]3. Soils with major compaction issues (thus preventing the roots to get down in the soil profile to access K, which naturally tends to stratify in soils through slow leaching over time).[br]In Hands On Agronomy, Kinsey also talks about using potassium sulfate instead of KCL. If a guy is going to broadcast he should use 0-0-50. If you're looking for a good liquid source of KTS that you can use with starter and/or side and, I can actually help with that. Just give me a call: 641-919-5574
http://journals.cambridge.org/download.php?file=%2FRAF%2FRAF29_01%2FS1742170513000318a.pdf&code=cb694876ba46d7662cf84720c13bb8d5#xml=http://journals.cambridge.org/data/userPdf/

The Potassium Paradox

http://journals.cambridge.org/download.php?file=%2FRAF%2FRAF29_01%2FS1742170513000318a.pdf&code=cb694876ba46d7662cf84720c13bb8d5#xml=http://journals.cambridge.org/data/userPdf/

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