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Tyler C. Hoskins, James S. Owen Jr., Jeb S. Fields, James E. Altland, Zachary M. Easton, and Alex X. Niemiera

. Brown and Pokorny (1977) reported that soluble potassium applied to the top of a pine bark-filled column resulted in K + adsorption to the bark and that the distribution of that adsorbed K + was uneven throughout the column with most retained in the

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Timothy Coolong, Andre Luiz Biscaia Ribeiro da Silva, and Justin Shealey

nitrate, ammonium nitrate, and urea. The 7–0–7 liquid fertilizer was derived primarily from salts of potassium nitrate and ammonium nitrate. The CN9 was derived primarily from Ca nitrate, with ammonium nitrate and urea. These represent two common

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Chandrappa Gangaiah, Amjad Ahmad, Hue V. Nguyen, Koon-Hui Wang, and Theodore J.K. Radovich

when was provided at 395 kg·ha −1 . Table 3. Effect of Eucheuma denticulatum algae and potassium nitrate on plant growth and tissue K from trial 2. Table 4. Effect of Kappaphycus alvarezii , potassium nitrate (KNO 3 ), and potassium chloride (KCl) on

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Ming Liu, Aijun Zhang, Xiaoguang Chen, Rong Jin, Hongmin Li, and Zhonghou Tang

Potassium (K + ) is an essential macronutrient required for crop growth and development, which is known to modify abundant enzyme activations in different metabolic pathways and to regulate cell osmotic pressure and stomatal movements ( Coskun et al

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T. Casey Barickman, Thomas E. Horgan, Jennifer R. Wheeler, and Carl E. Sams

al., 2003 ). Thus, growing lettuce under adverse environmental conditions can have an unfavorable effect on growth, yield, and quality. Potassium is vital to plant growth, yield, and quality even though it is not a constituent of any functional

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George E. Boyhan, Reid L. Torrance, and C. Randy Hill

addition, evaluations of P rates up to 98.2 kg·ha −1 showed no effect on onions ( Rodríguez et al., 1999 ). In a comprehensive study of the effect of potassium (K) on onion growth, it was shown that yield increased up to 100 kg·ha −1 application rate

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David R. Hershey, J. L. Paul, and R. M. Carlson


A sample of clinoptilolite with an exchangeable K, Na, Ca and Mg content of 160.0, 33.5, 18.7, and 0.4 meq/100 g was evaluated as a slow-release К fertilizer by leaching and growth studies of Chrysanthemum morifolium, Ramat. Potassium release from an amended potting medium indicated that clinoptilolite did not behave like a soluble K source but was very similar to slow-release fertilizers. A single application of 50 g clinoptilolite per 1.5 liters of potting medium produced 3-month chrysanthemum yields equal to those obtained with a daily irrigation with 234 ppm K.

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Kathryn M. Santos, Paul R. Fisher, Thomas Yeager, Eric H. Simonne, Hannah S. Carter, and William R. Argo

). Fertilizer salts used were ammonium nitrate, ammonium phosphate, calcium nitrate, magnesium nitrate, potassium nitrate, boric acid, copper sulfate, iron EDDHA, manganese sulfate, sodium molybdate, and zinc sulfate. For Days 7, 14, and/or 21, as shown in

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Yongfeng Yang, Zhixiao Yang, Shizhou Yu, and Hongli Chen

Potassium (K) is one of the major elements absorbed by plants and plays a critical role in plant growth, development, and physiological metabolism. Tobacco is known to be a K-favoring crop. Potassium is not only a crucial nutrient for tobacco, it

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Juan Carlos Díaz-Pérez, Jesús Bautista, Anthony Bateman, Guna Gunawati, and Cliff Riner

Bussard, 1993 ). After nitrogen, K is the nutrient required in largest amounts by plants ( Marschner, 2012 ). Potassium participates in various plant physiological processes associated with carbohydrate metabolism, such as photosynthesis, water relations