| Popis: |
1. Vigorous growth was shown by two accessions of basswood seedlings (Tilia americana L.) receiving complete nutrient solution in sand culture under conventional greenhouse conditions. 2. Highly statistically significant lower total dry weights and visual symptoms of deficiency were established in basswood for deficiencies of nitrogen, phosphorus, potassium, calcium, or magnesium. 3. No differences from controls were demonstrated for seedlings presumably deficient for sulfur. 4. Growth periods for roots, except of calcium-deficient plants, were appreciably longer than for shoot elongation. 5. Solution culture studies on a preliminary basis showed nutrient requirements evident for iron, less evident for manganese, zinc, and boron, and not evident for copper. 6. The ecological implications of these findings are discussed. |
