2023
DOI: 10.1002/agg2.20439
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Mapping variability of soybean leaf potassium concentrations to develop a sampling protocol

Carrie C. Ortel,
Trenton L. Roberts,
Kyle A. Hoegenauer
et al.

Abstract: The spatial variability of soybean [Glycine max (L.) Merr.] leaf‐K (potassium) concentrations must be considered when collecting samples to monitor crop K status. Five commercial soybean fields were sampled at a 0.4‐ha grid resolution at two reproductive growth stages to quantify the trifoliolate tissue‐K concentration. The objectives of this study were to identify the potential field variability of soybean leaf‐K concentrations in typical Mid‐south US soybean production fields, evaluate interpolation methods,… Show more

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Cited by 2 publications
(1 citation statement)
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“…This causes a significant challenge in nutrient management, emphasizing the importance of proactive tissue sampling to monitor the crop nutrient status. Production soybean fields in Arkansas have measured as much as 92% of the cropping area were yield limited by K hidden hunger when sampled at the R2 (full flower) and R4 (full pod) growth stages (Ortel et al., 2023). These fields were recently soil sampled and fertilized with preplant P and K fertilizer and exhibited no nutrient deficiency symptoms.…”
Section: Nutrient Balances and Imbalances Involving Potassiummentioning
confidence: 99%
“…This causes a significant challenge in nutrient management, emphasizing the importance of proactive tissue sampling to monitor the crop nutrient status. Production soybean fields in Arkansas have measured as much as 92% of the cropping area were yield limited by K hidden hunger when sampled at the R2 (full flower) and R4 (full pod) growth stages (Ortel et al., 2023). These fields were recently soil sampled and fertilized with preplant P and K fertilizer and exhibited no nutrient deficiency symptoms.…”
Section: Nutrient Balances and Imbalances Involving Potassiummentioning
confidence: 99%