sali misti potassici a basso titolo
English translation: low percentage (or mass fraction) mixed potassium salts
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| 18:51 Jun 13, 2009 |
| Italian to English translations [PRO] Science - Agriculture / mineral-based fertiliser - word order | |||||||
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|  Selected response from: texjax DDS PhD Local time: 11:32 | ||||||
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| 4 | Low titre mixed potassium salts |
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| 4 | low mass fraction mixed potassium salts |
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| low percentage |
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Answers
17 mins confidence: 
| Sali misti potassici a basso titolo Low titre mixed potassium salts Explanation: titre (or titer, US) is the exact term that corresponds to "titolo" in this context: titration is a procedure of successive dilution to obtain the desiderd concentration or to assess the minimum concentration capable of producing an effect (in pharmacology and serology) |
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6 hrs confidence:
| Sali misti potassici a basso titolo low mass fraction mixed potassium salts Explanation: Ciao rachel, la dicitura sembrerebbe questa. Buon lavoro :) The mass fraction (percent) nitrogen is reported directly. However, phosphorus is reported as phosphorus pentoxide (P2O5), the anhydride of phosphoric acid, and potassium is reported as potassium oxide (K2O), which is the anhydride of potassium hydroxide. Fertilizer composition is expressed in this fashion for historical reasons in the way it was analyzed (conversion to ash for P and K); this practice dates back to Justus von Liebig (see more below). Consequently, an 18-51-20 fertilizer would have 18% nitrogen as N, 51% phosphorus as P2O5, and 20% potassium as K2O, The other 11% is known as ballast and may or may not be valuable to the plants, depending on what is used as ballast. Although analyses are no longer carried out by ashing first, the naming convention remains. If nitrogen is the main element, they are often described as nitrogen fertilizers. In general, the mass fraction (percentage) of elemental phosphorus, [P] = 0.436 x [P2O5] and the mass fraction (percentage) of elemental potassium, [K] = 0.83 x [K2O] (These conversion factors are mandatory under the UK fertilizer-labelling regulations if elemental values are declared in addition to the N-P-K declaration.) An 18−51−20 fertilizer therefore contains, by weight, 18% elemental nitrogen (N), 22% elemental phosphorus (P) and 16% elemental potassium (K). http://www.isragri.com/inorganic_fertilizers.html Mass fraction conversion "Mass fraction" conversion factors are mandatory under the UK fertilizer-labelling regulations if elemental values are declared in addition to the N-P-K declaration.[9]) In phosphorous pentoxide, the element phosphorous constitutes about 43.6% of the total mass of the compound. Thus, the official UK mass fraction (percentage) of elemental phosphorus, [P] = 0.436 x [P2O5] Likewise, the mass fraction (percentage) of elemental potassium, [K] = 0.83 x [K2O] Thus an 18−51−20 fertilizer therefore contains, by weight, 18% elemental[citation needed] nitrogen (N) , 22% elemental phosphorus (P) and 16% elemental potassium (K). http://en.wikipedia.org/wiki/Fertilizer#Chemical_Content http://www.google.com/search?hl=en&ie=ISO-8859-1&q="mass fra... Il titolo dichiarato di un fertilizzante indica il suo contenuto percentuale rispetto al prodotto tal quale in N, P2O5 e K2O riportati sempre in quest'ordine in etichetta prodoto. E' possibile riportare il titolo anche di altri elementi nutritivi, che saranno allora espressi con riferimento a ossido di Ca, CaO, ossido di Mg, MgO, ossido di Na, Na2O, anidride solforosa, SO3 o zolfo S o direttamente al singolo elemento negli altri casi. http://www.fertirrigazione.it/ita_790/ Sulle confezioni dei concimi vengono indicate delle cifre, separate da trattini, o a volte interspaziate da segni di addizione. Se ci troviamo davanti a un composto minerale che riporta il titolo 15-3-15, vuol dire che su 100 Kg. di prodotto 15 saranno di Azoto, 3 di Fosforo e ancora 15 di Potassio. http://www.guidaconsumatore.com/agricoltura_giardinaggio/con... |
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Reference comments
3 days 22 hrs |
| Reference: low percentage Reference information: Chemical Studies in the Physiology of Apples. These were peeled, cored, cut up and thoroughly mixed, and ... temperatures cause loss of sulphate and of potassium salts. At intervals ...... Canterbury contain a very ***low percentage *** of magnesia. These apples keep ... http://aob.oxfordjournals.org/cgi/pdf_extract/os-40/1/129 Chemistry of Vegetable Physiology and Agriculture. Effect of Potassium Salts on Nitrification. .... Another analytical point made out is the very low percentage of cellulose ... substance he calls paramannan, which, mixed with .. http://www.rsc.org/delivery/_ArticleLinking/DisplayArticleFo... http://www.springerlink.com/content/g345072xp6l35286/ Problems op the chemistry and technology of mineral fertilizers in ... .......nutrient sot)stances than the ordinary ***low-percentage ***fertilizers, ... is e interaction ,of nitric acid extracts with amrrmnium o; potassium salts (without .... duction of complex and mixed fertilizers meeting the requirements of the ... http://www.ca.uky.edu/agc/pubs/agr/agr53/agr53.htm AGR-53: Lawn Fertilization in Kentucky ... with these mixed fertilizers because of the potassium salts they include. ... most of which have a low percentage of nitrogen or are fortified with urea |
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