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प्रश्न
What is a seed ball?
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उत्तर
A seed ball is an ancient Japanese technique of encasing seeds in a mixture of clay and soil humus (also in cow dung) and scattering them onto suitable ground, not planting trees manually. This method is suitable for barren and degraded lands for tree regeneration and vegetation before the monsoon period where the suitable dispersal agents become rare.
संबंधित प्रश्न
Read the given statements and select the correct option.
- Hydrophytes possess aerenchyma to support themselves in water.
- Seeds of Viscum are positively photoblastic as they germinate only in presence of light.
- Hygroscopic water is the only soil water available to roots of plants growing in soil as it is present inside the micropores.
- High temperature reduces use of water and solute absorption by roots.
In soil water available for plants is
The plant of this group are adapted to live partly in water and partly above substratum and free from water
Ophrys an orchid resembling the female of an insect so as to able to get pollinated is due to phenomenon of
In a fresh water environment like pond, rooted autotrophs are
Sticky glands of Boerhaavia and Cleome support
Why are some organisms called as eurythermals and some others as stenohaline?
Soil formation can be initiated by biological organisms. Explain how?
Sandy soil is not suitable for cultivation. Explain why?
Describe the mutual relationship between the fig and wasp and comment on the phenomenon that operates in this relationship.
What is thermal stratification? Mention their types.
What is myrmecophily?
Explain Raunkiaer classification in the world’s vegetation based on the temperature.
Explain different types of hydrophytes with examples.
Identify the A, B, C, and D in the given table
| Interaction | Effects on species X | Effects on species Y |
| Mutualism | A | (+) |
| B | (+) | (-) |
| Competition | (-) | C |
| D | (-) | 0 |
What is the soil profile? Explain the characters of different soil horizons.
