Abstract:Potassium (K) deficiency symptoms of rice (Oryza sativa L.) are difficult to visually diagnose during reproductive growth. Critical tissue–K concentrations may change across time and within cultivars. Our goal was to evaluate rice yield response to K fertilization and define continuous critical Y‐leaf–K concentrations (YLKC) for the production of ≥95% relative yield in pure‐line and hybrid rice. Ten Y‐leaves (uppermost leaf with a fully developed collar) were collected weekly during rice reproductive growth fr… Show more
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