Potash & Phosphate Institute/Potash & Phosphate Institute of Canada
Information about the production, distribution and use of potash and its influence on soil fertility. Includes maps of soil K levels.
http://www.ppi-ppic.org/

Potash Corporation of Saskatchewan
Commercial producer of nitrogen, phosphate and potash in Canada.
http://www.potashcorp.com/

International Potash Company
Exporter of potash fertilizers from Russia and Belarus.
http://www.ipcmos.com/

Cleveland Potash Limited
Providers of top quality agricultural and chemical potash for markets across the globe.
http://www.clevelandpotash.ltd.uk/

Mody Chemical Industries
Mody Chemical Industries - Manufacturer, exporter of bromine, fine chemicals, inorganic bromide, bromide compounds, hydrochloric acid, methylene chloride, caustic soda flakes, caustic soda lye, n-propyl bromide, n-butyl bromide from india.
http://www.modychem.com/

CF Industries, Inc.
CF Industries, Inc., a wholly owned subsidiary of CF Industries Holdings, Inc., is one of the largest manufacturers and distributors of nitrogen and phosphate fertilizer products in North America.  Our principal products in the nitrogen fertilizer business are ammonia, urea and urea ammonium nitrate solution, or UAN.  Our principal products in the phosphate fertilizer business are diammonium phosphate, or DAP, and monoammonium phosphate, or MAP.
http://www.cfindustries.com/

IMC Global Inc
The Mosaic Company is one of the world's leading producers and marketers of concentrated phosphate and potash crop nutrients. For the global agriculture industry, Mosaic is a single source for phosphates, potash and nitrogen fertilizers, and animal feed ingredients.
http://www.imcglobal.com/

Blossom End Rot in Tomatoes
Most of us have had tomatoes suffering from blossom end rot at some time - the base of the fruit flattens, eventually becoming concave, and goes brown, remaining hard, despite the name rot
http://www.nvsuk.org.uk/growing_show_vegetables_1/tomato-blossom-end-rot.php

Companhia Vale do Rio Doce
Brazilian mining company with activities in bauxite, iron ore, manganese, kaolim and potash mines .
http://www.cvrd.com.br/

Société Commerciale des Potasses et de l'Azote
SCPA is a major player on the world potash market. Through its international sales network, SCPA offers also soluble speciality fertilizers.
http://www.scpa.com