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July 25, 2025AgronomyOpen Access

Potato Productivity Response to Potassium Fertilizer Source and Rate in Oregon’s Columbia Basin

Shahram Torabian John Jacob Pieper Ruijun Qin Christos Noulas Vidyasagar Sathuvalli B. A. Charlton Surendra K. Dara R. R. Spear

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Key Points

Potassium fertilizer significantly increased total yield and US No. 1 yield of potatoes, showing a 10% and 12% rise, respectively.
Among potato cultivars, Umatilla Russet reached the highest yield at 56.5 tons per hectare in trials conducted over two years.
Application rates between 224 and 896 kg K2O ha−1 generally did not yield significant differences, with a breakpoint at 251 kg K2O ha−1.
Both potassium sulfate and potassium chloride resulted in similar yields, highlighting flexibility in fertilizer choice.

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Implication

Observational analysis evaluates yield increases from potassium sources in potato cultivars, indicating optimal application rates.

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Cite This Study

Torabian et al. (2025) studied this question.

synapsesocial.com/papers/68c1ae7f54b1d3bfb60e6cf1 https://doi.org/10.3390/agronomy15081795

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