Boron Fertilization and Evaluation of Four Soil Extractants: Russet Burbank Potato
2010
Hopkins, B.G. | Jolley, V.D. | Webb, B.L. | Callahan, R.K.
Yield-response correlations with old and improved soil extraction methods for boron (B) are needed. Russet Burbank potato (Solanum tuberosum L.) was grown with two, four, and six B treatments applied in 2004, 2005, and 2006, respectively. Zero and 1.1, 2.2, or 3.4 kg B ha-1 soil and 0.22 or 0.28 kg B ha-1 foliar treatments were applied. Boron fertilization did not significantly increase tuber yield or quality despite initially low hot-water-extractable B (0.34-0.50 mg kg-1), although postseason B for unfertilized treatments increased (0.51-0.57 mg kg-1). Soil-applied B generally reflected B application relative to the untreated control and the low foliar rates in all three years for the four soil extractions utilized [hot water, pressurized hot water, diethylenetriaminepentaacetic acid (DTPA)-sorbitol, and Mehlich III]. Boron content of potato petiole did reflect application of B in 2 years, but tuber and peel tissues did not consistently reflect application of B.
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