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fertilizers
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- 1Potassium ChlorideKCl. 50-52% K. Most widely used K fertilizer, Mined from the ground potash mine in Saskatchewan.
- 2Potassium SulfateK2SO4. 44% K, used for Cl sensitive crops like tobacco and potato.
- 3Potassium Nitrates and PhosphatesBlends with N/P for specialty application for K.
- 4"Adequate" soluble K10ppm, can range from 4-40ppm K.
- 5"Adequate" exchangeable K<75ppm is deficient, 75-125ppm is moderately deficient, 125-150ppm is marginal, 150+ is adequate
- 6Potassium Soil TestsNh4Ac or NH4NO3, Olsen Extract, Kelowna Extract
- 7Elemental SThis fertilizer must be finely ground and mixed with soil to maximize surface area for adsorption - should also be applied in advance of uptake, since it takes time to oxidize to SO42. Formulated as bentonitite to be blended with NPK fertilizers.
- 8Ammonium thiosulfate12% N, 26% S. This is a liquid formation of S that can be applied as a fertigation technique - the SO42 is immediately available for uptake.
- 9Ammonium Polysulfied, Urea-Sulfuric AcidN and S solutions for use on high PH soil
- 10NH4K, K, Urea sulfates12-26% S. (NH4)2SO4.
- 11Phosphorous FertilizersRock phosphate, phosphoric acids, Ca orthophostphate, ammonium phosphate, ammonium polyphosphate
- 12Rock phosphateApaptites are stable calcium phosphate minerals. RP contains 27-41% P that is not water soluble but will break down in weak acids. Treating them with strong acids makes them more available. Soil acidity promotes dissolution, soil with low Ca acts as a sink for apatit Ca, and soil P concentration will determine how much it breaks down.
- 13Phosphoric AcidH3PO4. Rock phosphate + H2SO4. Used to manufacture other fertilizers.
- 14Ca OrthophosphateSingle super phosphate, all available.
- 15Ammonium phosphateNH3 + H3PO4, phosphorous uptake is enchanged by nitrogen. This is the most used phosphorus fertilizer.
- 16Ammonium polyphosphateNH3 + H4P2O7. 10-15% N, 15-16% P. Can be applied in liquid form.
- 17Adequate phosphorus40ppm
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- Fichas sobre fertilizers, creado por Maya Frederickson el 21/04/2017.
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- Maya Frederickson
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