AI Summary

Researchers led by Dr. Shikma Zaarur at the Hebrew University of Jerusalem, together with Dr. Ran Erel of the Agricultural Research Organization‑Volcani Institute, report that conventional soil tests miss a large reservoir of potassium in agricultural fields. Their study, published in Plant and Soil, shows that standard measurements do not accurately reflect the potassium actually available to crops. The authors suggest that recognizing this hidden pool could enable more precise fertilizer recommendations, reducing excess fertilizer use and supporting sustainable production.

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