| Anne Ricci
The Effect of pH on the Growth of Marigolds
| Division: | Sciences de la terre et de l'environnement | | Catégorie: | Junior | | Région: | York | | Ville: | Markham, ON | | École: | St. Patrick Catholic Elementary School | | Sommaire: | 81 marigolds in 3 rows (control, fertilizer, limestone) of 9 pots were watered with solutions of pH 3-11. Germination, height and number of leaves were recorded for 6 weeks. Optimal growth occurred at pH 5-7. Fertilizer improved growth. Limestone improved growth in acid soils. Neither prevented the effect of abnormal pH. |
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