International Potash Institute
K in the literature

Potassium Substitution by Sodium in Sugar Beet (Beta vulgaris) Nutrition on K-Fixing Soils.
Wakeel, A., D. Steffens, and S. Schubert
J. Plant Nutr. Soil Sci. 173(1):127-134 (2009), English

Doses e Formas de Aplicação da Adubação Potássica na Rotação Soja, Milheto e Algodão em Sistema Plantío Direto; Potassium Fertilization of Soybean, Pearl Millet, and Cotton in a No-Till Rotation System in the Cerrado Region
Alberto Carlos de Campos Bernardi, Juarez Patrício de Oliveira Júnior, Wilson Mozena Leandro, Tiago Gomes da Silva Mesquita, Pedro Luiz de Freitas, Maria da Conceição Santana Carvalho
Pesquisa Agropecuária 39(2):158-167 (2009), Portuguese

Nutrient Management Strategies in Participatory Watersheds in Semi Arid Tropical India
Srinivasa Rao, Ch., S.P. Wani, K.L. Sahrawat, and B. Rajasekharao
Indian J. of Fertilizers 5(12)113-116, 119-122, 125-128, 12 p (2009), English

Integrated Plant Nutrient Supply and Management Strategies for Enhancing Soil Quality, Nutrient Use Efficiency and Crop Productivity
Swarup, A., and T.J. Purakayastha
Indian J. of Fertilizers 5(12)77-80, 83-86, 89-92, 95-98, 101-104, 107-110, 24 p (2009), English

Efficiency of Potash Fertilizer in Rice-Wheat Cropping System in Northwestern Region of Bangladesh
Mazid Miah, M.A., P.K. Saha, A. Islam, A.T.M.S. Hossain, and V.V. Nosov
Bangladesh J. Agric. and Environ. 5(1):19-31 (2009), English

Growth and Photosynthesis of Salt-Tressed Sunflower (Helianthus annuus) Plants as Affected by Foliar-Applied Different Potassium Salts
Akram, M.S., M. Ashraf, M. Shahbaz, and N.A. Akram
J. Plant Nutr. Soil Sci. 172:884-893 (2009), English

Long-Term Fertilizer Experiment Network in China: Crop Yields and Soil Nutrient Trends
Zhao, B.q., X.y. Li, X.p. Li, X.j. Shi, S.m. Huang, B.r. Wang, P. Zhu, X.y. Yang, H. Liu, Y. Chen, P. Poulton, D. Powlson, A. Todd, and R. Payne
Agron. J. 102:216-230 (2010), English

Rate and Timing of Potassium Fertilization and Fungicide Influence Rice Yield and Stem Rot
Maschmann, E.T., N.A. Slaton, R.D. Cartwright, and R.J. Norman
Agron. J. 102:163-170 (2010), English

Potassium Uptake and Partitioning Relative to Dry Matter Accumulation in Cotton Cultivars Differing in Maturity
Gwathmey, C.O., C.L. Main, and X. Yin
Agron. J. 101:1479-1488 (2009), English