News Feed Forums Soil Health Sap results for Harriet Mellas Johnson su grown tomato. Reply To: Sap results for Harriet Mellas Johnson su grown tomato.

  • stephen sinnott

    Member
    October 7, 2021 at 8:08 am
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    @EddieB that is a very large and complicated question, I would start with the advancing eco agriculture webinars on you tube that address sap analysis. As succinctly as I can make it, all nutrients in the sap come from the soil or the leaves, the sap carries all the active nutrients so measuring it is a great way of telling what nutrients the plant has access to.

    All the nutrients have relationships to at least some other nutrients and also to pest and disease susceptibility.