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Ability of chemical extraction procedures to assess the agronomic effectiveness of phosphate rock materials
| Content Provider | Scilit |
|---|---|
| Author | Mackay, Alec Syers, J. K. Gregg, P. E. H. |
| Copyright Year | 1984 |
| Description | The ability of 7 chemical extraction procedures to assess the agronomic effectiveness of phosphate rock (PR) was evaluated using perennial ryegrass and white clover grown in 6 soils in a glasshouse. Of the conventional, single chemicalextraction procedures evaluated, 2% formic acid appeared to be the most useful. Two 2% citric acid procedures (which produced very similar results) and neutral ammonium citrate (NAC) at the first extraction were poor indicators of agronomic effectiveness. Of the sequential extraction procedures investigated, the 2% formic acid (sum of 2 extractions), both of the 2% citric acid (sum of 3 extractions), and the NAC (sum of 4 extractions) gave the best correlation with agronomic performance. The use of sequential extractions also improved the predictive ability of these extractants in the longerterm, a limitation shown by the conventional, single chemical-extraction procedures. Sequential extraction appears to be the only extraction technique suitable for assessing the agronomic effectiveness of PR containing appreciable amounts of $CaCO)_{3}$, such as Chatham Rise phosphorite (CRP). for routine analysis, a single extraction procedure is much more suitable. The results of this study indicate that the presently used 2% citric acid procedure is less suitable than extraction with 2% formic acid for assessing agronomic effectiveness of PR. |
| Related Links | https://www.tandfonline.com/doi/pdf/10.1080/00288233.1984.10430424?needAccess=true |
| Ending Page | 230 |
| Page Count | 12 |
| Starting Page | 219 |
| ISSN | 00288233 |
| e-ISSN | 11758775 |
| DOI | 10.1080/00288233.1984.10430424 |
| Journal | New Zealand Journal of Agricultural Research |
| Issue Number | 2 |
| Volume Number | 27 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 1984-05-01 |
| Access Restriction | Open |
| Subject Keyword | Soil Science Phosphate Rocks Fertilisers Chemical Tests Fertiliser Efficiency |
| Content Type | Text |
| Resource Type | Article |
| Subject | Agronomy and Crop Science Soil Science Plant Science Animal Science and Zoology |
