Abstract
In a trial with pots, filled with peat, and the treatments 0N, 0P and 0K an unfavourable influence of triple superphosphate on freesias was observed. The crop showed scorching of the leaf margin, that turned out to be a symptom of fluorine excess. Especially monocotyle bulbous and cormous crops were susceptible to excess of fluoride from the substrate. In some trials a relation was found between the contents of fluorine in soil and in the crop, in others a relation between soil fluoride content and percentage of scorched leaf
Over hundred samples of soils were collected in the Netherlands and analysed for total fluorine, 'labile' fluoride and water soluble fluoride.
The pH of the soil was found to be an important factor regulating fluoride uptake and leaf scorch. Evaporation probably is the cause that other factors, such as electrolyte concentration of the soil, the season, the temperature of soil and air, the occurence of diseases, are of influence on leaf scorch while foliar fluorine is not clearly changed.
| Original language | Dutch |
|---|---|
| Qualification | Doctor of Philosophy |
| Awarding Institution | |
| Supervisors/Advisors |
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| Award date | 4 Oct 1974 |
| Place of Publication | S.l. |
| Print ISBNs | 9789022005200 |
| DOIs | |
| Publication status | Published - 4 Oct 1974 |
Keywords
- liquids
- absorption
- emission
- circulation
- roots
- ornamental plants
- iridaceae
- crop damage
- air pollution
- fluoride
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