Member discussion regarding the methods, varieties and merits of growing tomatoes.
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June 17, 2010 | #16 |
Tomatovillian™
Join Date: Feb 2006
Location: Germany 49°26"N 07°36"E
Posts: 5,041
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In Exel LG and Agri Fos the primary ingredient is Phosphorous Acid. It is not the same as Phosphorus which is a macro fertilizer and what we refer to as "P" in N-P-K when talking Ferts.
A more detailed description; Phosphorous Acid as Fertilizer? Phosphorous acid does not get converted into phosphate, which is the primary source of P for plants. In contrast, some soil bacteria are capable of transforming phosphonate into phosphate. However, this process is so slow that it is of no practical relevance. To date, no plant enzymes have been described that could oxidize phosphonate into phosphate. This explains why phosphonate is stable in plants and does not get converted into phosphate. Since phosphorous acid and its derivatives do not get metabolized in plants, claims that phosphonate can contribute to phosphorus nutritional needs of the plants should be taken with caution.
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