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Xiaoya Cai, Laurie E. Trenholm, Jason Kruse, and Jerry B. Sartain

of growth regulators ( Harivandi and Gibeault, 1997 ; Qian and Engelke, 1998 ). Potassium has been shown to enhance turfgrass resistance to biotic and environmental stresses ( Turner and Hummel, 1992 ). It can additionally aid in the production of

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Qiang Zhu, Monica Ozores-Hampton, Yuncong Li, Kelly Morgan, Guodong Liu, and Rao S. Mylavarapu

Florida ranked first nationally in fresh market tomato ( Solanum lycopersicum L.) production with 13,030 ha harvested and a total value of US $453 million in 2015 ( U.S. Department of Agriculture, 2016) . Potassium is an essential element in tomato

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Timothy K. Broschat

on cold tolerance. Similarly, potassium has been shown to have positive ( Webster and Ebdon, 2005 ), negative ( Beattie and Flint, 1973 ), or no ( Cook and Duff, 1976 ; Kelley, 1972 ) influence on the cold tolerance of plants. Potassium is thought to

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Bielinski M. Santos

Open-field tomato production in Florida occurs on ≈32,000 acres and generates above $630 million in gross sales ( U.S. Department of Agriculture, 2011 ). Potassium is one of the two most-absorbed essential elements for tomato growth and development

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Chao-Yi Lin and Der-Ming Yeh

Differential growth and quality responses to potassium (K) have been reported for foliage plants. Potassium deficiency is a widespread disorder on many palm species worldwide ( Chase and Broschat, 1991 ). Under conditions of K deficiency, K from

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Patience Seyram Akakpo, Moosa Mahmood Sedibe, Bello Zaid, Zenzile P. Khetsha, Mokgaputsiwa P. Theka-Kutumela, and Fhatuwani N. Mudau

). Therefore, nutrient solutions are specifically formulated to meet the requirements of specific crops ( Ávila-Juárez et al., 2017 ; Combrink, 2019 ). In plants, potassium (K) plays a vital role in metabolism, the cation–anion balance, and stress resistance

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M. Leonard Wells and Bruce W. Wood

clearcut ( Pond et al., 2006 ). Two common fertilizer supplements to commercial orchards are nitrogen (N) and potassium (K). The lower and upper foliage sufficiency concentrations for these vary from 2.3% to 4.0% depending on the extension service

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Silvia Jiménez Becker, Blanca María Plaza, and María Teresa Lao

Potassium (K) is an essential element for all living organisms. In plant physiology, it is the most important cation not only in regard to its content in plant tissues, because it is the most abundant cation in plant tissues ( Triboulot et al., 1997

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H.T. Kraus, S.L. Warren, G.J. Bjorkquist, A.W. Lowder, C.M. Tchir, and K.N. Walton

nitrate, monoammonium phosphate, and potassium sulfate were used to supply N, P, and K, respectively, using one Dosatron injector ( Table 1 ). Micronutrients were supplied from a concentrated modified Hoagland's solution ( Hoagland and Arnon, 1950 ) using

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James E. Altland and James C. Locke

, Bannockburn, IL) for concentrations of nitrate (NO 3 – ), ammonium (NH 4 + ), phosphate (PO 4 2– ), and potassium (K). The leaching study was repeated 27 Sept. 2011 using the same method with the exceptions that only 11 leaching events were conducted and