International Potash Institute
K in the literature

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

Performance of an Optimized Nutrient Management System for Double-Cropped Wheat-Maize Rotations in North-Central China
He, P., S. Li, J. Jin, H. Wang, C. Li, Y. Wang, and R. Cui
Agron. J. 101:1489-1496 (2009), English

Assessment of Potassium Supply for Corn by Analysis of Plant Parts
Mallarino, A.P., and S.L. Higashi
Soil Sci. Soc. Am. J. 73:2177-2183 (2009), English

Advance of Rice Fertilizer-Nitrogen Use Efficiency
Xu, F.X., H. Xiong, R. Xie, L. Zhang, Y.C. Zhu, X.Y. Guo, D.J. Yang, X.B. Zhou, and M. Liu
Plant Nutrition and Fertilizer Science 15(5):1215-1225 (2009), Chinese