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- W2066651711 abstract "1. A long-term investigation consisting of field, pot and laboratory experiments has been commenced to study the extent, rate, nature and significance of phosphate fixation in north Scottish soils with the ultimate objects of improving fertilizer practice and standardizing methods for determining readily soluble phosphate. 2. Quantities of a phosphate-deficient soil derived mainly from granitic drift were treated with incremental dressings of phosphate and exposed in earthenware pots in the open. The soil had an initial p H of 5·80 and a total phosphate content of 0·250% of which 28% is soluble in constant-boiling HCl solution. 3. The recovery of added phosphate by different methods from samples taken after varying periods of exposure has been studied. Data are given for extractions with calcium lactate, acetic acid, potassium bisulphate, citric acid, magnesium bicarbonate, sodium hydroxide, hydrochloric acid, and chloride and sulphate solutions, together with pot experiments and determinations by the Neubauer and aspergillus methods. 4. Complete recovery is approached only in strongly acid and strongly alkaline extracts, and about 25% of the added phosphate is very firmly bound by the soil. The solubility varies greatly with the p H of the extracts and is very low at p H values in the region of 5. At lower p H values, however, the nature and concentration of the anions present are also of considerable importance. The results indicate a high capacity for fixing phosphate in difficultly soluble form." @default.
- W2066651711 created "2016-06-24" @default.
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- W2066651711 date "1943-10-01" @default.
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- W2066651711 title "Studies on phosphate fixation in Scottish soils. I. The recovery of added phosphate from a soil of the acid igneous group" @default.
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- W2066651711 doi "https://doi.org/10.1017/s0021859600007139" @default.
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