| Автор | Nesse, P. |
| Автор | Grava, J. |
| Автор | Bloom, P.R. |
| Дата выпуска | 1988 |
| dc.description | AbstractPhosphorus was extracted from 30 alkaline soils from western Minnesota using the Olsen NaHCO<sub>3</sub>, the Soltanpour AB‐DTPA, Mehlich 2, Mehlich 3, Bray‐1, and resin methods. Values from the first six methods were compared to resin extractable phosphorus.The NaHCO<sub>3</sub>‐P values for 30 soils were most closely related to resin extractable‐P values with r ‐ 0.943, followed by the AB‐DTPA with r ‐ 0.889, and Mehlich 3 with r ‐ 0.809. Bray‐1 values from three different soil‐to‐solution ratios were less closely related to resin P. The correlation coefficient between Olsen NaHCO<sub>3</sub>‐P and Bray‐1 was r ‐ 0.693 for all 30 soils.Soils were divided on the basis of their reaction to dropwise addition of 10% HC1. Violently effervescent samples (n‐15), with one exception, were found to be those soils in the study group with calcium carbonate equivalent (CCE) ranging from 7 to 62 percent. Non‐violently effervescing soils (n‐15) were found to have CCE of less than 7 percent. The elimination of the violently effervescing, high CCE soils from the study group resulted in r values greater than 0.9 for all methods when compared to resin P. Improvement in the relationships between the acid extractants (Bray‐1 and Mehlich 2 and 3) with resin P was attributed to elimination of high CCE soils. Improvement in the relationship between AB‐DTPA and resin P was attributed to the removal of high clay soils that, by chance, also contained high CCE. Olsen NaHCO<sub>3</sub> and Bray‐1 (1:10 soil‐to‐solution ratio) values were closely related (r‐0.973) for the non‐violently effervescing (low CCE) soils.Only the NaHCO<sub>3</sub> values were closely related to resin P for the 15 high calcium carbonate soils, although AB‐DTPA values were closely related to resin P when the high clay (> 35%) soils were removed. |
| Формат | application.pdf |
| Издатель | Taylor & Francis Group |
| Копирайт | Copyright Taylor and Francis Group, LLC |
| Тема | Phosphorus soil tests |
| Тема | alkaline soils |
| Название | Correlation of several tests for phosphorus with resin extractable phosphorus for 30 alkaline soils |
| Тип | research-article |
| DOI | 10.1080/00103628809367967 |
| Electronic ISSN | 1532-2416 |
| Print ISSN | 0010-3624 |
| Журнал | Communications in Soil Science and Plant Analysis |
| Том | 19 |
| Первая страница | 675 |
| Последняя страница | 689 |
| Аффилиация | Nesse, P.; Department of Soil Science, University of Minnesota |
| Аффилиация | Grava, J.; Department of Soil Science, University of Minnesota |
| Аффилиация | Bloom, P.R.; Department of Soil Science, University of Minnesota |
| Выпуск | 6 |
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