New study suggests farmers may overfertilize fields with potassium
Researchers from the Hebrew University of Jerusalem and the Agricultural Research Organization, Volcani Institute published findings in Plant and Soil challenging standard soil testing methods.
Conventional tests miss hidden reserves
The research team found that agricultural soils contain a substantial reservoir of potassium overlooked by current testing. Standard methods measure only exchangeable potassium, which significantly underestimates the total amount available to crops. This approach fails to account for mineral reserves that can supply plants over geological timescales.
Experiment reveals nutrient capacity
A thirteen-month greenhouse experiment demonstrated that conventional approaches underestimate the soil's natural ability to provide this essential nutrient. The study indicates that farmers might be applying unnecessary amounts of fertilizer based on inaccurate measurements. These findings could lead to more precise recommendations for sustainable agricultural production.
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