Soil, potassium

Roca, M.C., and Vallejo, V.R., 1995, Effect of soil potassium and calcium on caesium and strontium uptake by plant roots. J. Environ. Radioac. 28 141-159. 

Sparks DL (ed) (1986) Soil physical chemistry. CRC Press, Boca Raton, Florida Sparks DL (1989) Kinetics of soil processes. Academic Press, San Diego Sparks DL, Huang PM (1985) Physical chemistry of soil potassium. In Munson RE (ed) Potassium in agriculture, ASA, Madison, Wisconsin, pp 201-276 Sparks DL, Jardine PM (1984) Comparison of kinetic equations to describe K-Ca exchange in pure and mixed systems. Soil Sci 138 115-122 Spencer WF, Cliath MM (1969) Vapor densities of dieldrin. Environ Sd Technol 3 670-674 Spencer WF, Chath MM (1973) Pesticide volatilization as related to water loss from soil. J Environ Qual 2 284-289... 

Potassium is lequiied by both plants and animals Although the total amount of potassium in most soils is usually rather high, the level of available or soluble forms of the element is frequently too low to meet the needs of growing plants. Deficiencies of plant-available potassium are more frequent in the soils of the eastern rather than of the western United States. See also Soil. Potassium in the form of soluble potassium salts is a very common constituent of fertilizers. See also Fertilizer. 

Beckett, P. H. T. 1964. Studies on soil potassium. I. Confirmation of the ratio law Measurement of potassium potential. J. Soil Sci. 15 1-8. 

Rich, C. I. 1968. Mineralogy of soil potassium. In V. J. Kilmer, S. E. Younts, andN. C. Brady, Eds. The Role of Soil Potassium in Agriculture, American Society of Agronomy, Madison, WI, pp. 79-96. 

Cause Potassium deficiency. Prevent problems by spraying plants with seaweed extract every 2 weeks. Check soil potassium with a soil test and amend as necessary. 

The value of wood ashes for soil enrichment is mentioned in the Bible and by the early Greek and Roman writers. Farmers were advised to bum vines and stubble on the spot and the plow in the ashes to enrich the soil. Potassium nitrate is also referred to in the Bible in the Book of Luke and by early Greek and Roman writers as being useful for the fertilization of crops. 

Soluble potassium may be made available to plants by the action of biological end products upon. the zeolite compounds of the soil. Maclntire has shown, however, that the economic additions of calcic and inorganic materials function to protect native soil potassium and give a repressive rather than a liberative chemical effect. 

Rocks and Soils Potassium is a major element of the lithosphere with an average level of 24.1-25.9 g kg (Falbe and Regitz... 

Unknown sandy soil Potassium hydrogen phthalate... 

Fallout Cs, mostly deposited up to the 1980s, is more mobile and more easily absorbed by plants than stable Cs in the soil. Potassium in the soil is reported to be a competitive factor for the transfers of both Cs and stable Cs from soil-to-polished rice. A similar difference between the transfer of Cs and stable Cs was reported for polished rice (TF is about 40), wild mushrooms (4), and potato tubers (about 3) (Tsukada et al. 2002). 

Evangelou, V. R, J. Wang, and R. E. Phillips. 1994. New developments and perspectives on soil potassium quantity/intensity relationships. In Advances in Agronomy, ed. D. L. Sparks, 52 173-227. New York Academic Press, http //www.sciencedirect.com/science/article/ B7CSX 987WV-9/2/2dl 14c45add9280c27d84f69cf710871. 

Ghosh, D., and A. Debnath. 2010. Stndy on the threshold valnes of soil potassium parameters for release and fixation A prognostic approach to improve the nse efficiency of soil and fertihzer potassinm. Communications in Soil Science and Plant Analysis 41, no. 22 2661. doi 10.1080/00103624.2010.518047. 

Because of the restrictions on fertiliser and mannre sources several stockless organic farms have now introdnced a livestock system. There are, however, a number of successful stockless farms, which often have started with high levels of soil potassium or have soils with a reasonable clay content. These soils should have sufficient amonnts of potassium mineralised each year for crop production. 

Some clay soils can release 50 kg/ha of potash annually. On these soils potassium applications should be reduced accordingly. 

Arnold, P. W., 1960. Nature and mode of weathering of soil potassium reserves. J. Sci, Food and Agric, 6 285-292. 

Potassium fixation in soils. Potassium Symposium, International Potash Institute,... 

Wiklander, L., 1955. Forms of potassium in the soil. Potassium Symp. 109 (Kungl. LantbrHogsk, Uppsala, Sweden). 

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