I remember reading a review article published sometime between 2015 and 2022, likely from a European or American journal. It compared KCl with alternative mineral sources (like rock powders), and the authors argued that KCl leads to higher crop yields and biomass production, and it ultimately contributes to greater soil organic matter and benefits the soil microbiota. Does anyone recall this study?
عند حد معين يؤثر وبشكل إيجابي ولكن عند ارتفاع تركيز يغير درجة حموضة التربة نحو القاعدية وبذلك تتأثر بعض الأنواع من ميكروبات التربة At a certain level, it has a positive effect, but when the concentration increases, it changes the soil acidity towards alkalinity, thus affecting some types of soil microbes.
While I didn't spot this study, my feeling is that microbiomes always change, but without necessarily causing harm. However rock powders may be contaminated with heavy metals, and they will be detrimental. Due to past activities like the addition of lead to petrol and the burning of coal, residual heavy metal pollution should be treated much more seriously than it currently is...
Thanks David Smith
I kept my search but without success so far. Even so, I remember one part of the discussio in which authors stated that even tough KCl harms microrganisms in laboratory experiments, soil microbioal comunities could be benefited from KCl usage on agricultural land. That is because kcl usually increases crops yields, and therefore causes grater biomass production in comparison to rock powders, which positively affects organic matter input on soil, favouring soil biological quality.
With the best regards,
Guilherme
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