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Strawberries and Caneberries
 
University of California Agriculture and Natural Resources Agriculture and Natural Resources Blogs
THU, SEP 23 2021
1:34:18
Comments:
by Tom Walters
on November 22, 2013 at 2:16 PM
Great article Mark, thanks! Any thoughts on whether the abundance of Ca and Mg in California soils, coupled with the heavy K usage of both raspberries and strawberries, presents any particular challenges for potassium nutrition of these crops? Could I appear to have sufficient K, but be constrained in how much actually gets into the plant, on account of having so many cation exchange sites occupied by Ca and Mg?
by Mark Bolda
on November 22, 2013 at 2:23 PM
Hi Tom, thanks for your input. I think the only thing I could say to your question is that I have yet to receive or handle a tissue sample which is even close to deficient in K. Based on what I learned at the Soil Fertility meeting in Davis in October, I think the MASSIVE amount of K already in the soil from the time people started farming here coupled with the near continuous contribution from fertilizers pretty well guarantees we won't be short K for a while, no matter how many of the exchange sites are occupied by the other cations.
 
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