Layers of the soil are called horizons. Here are the horizons:
- Humus
- Topsoil
- Subsoil
- Fragmented rock
- Bedrock
Once a soil has developed, it forms layers called horizons. Beneath a surface layer of a plant remains, the topsoil is rich in decomposed plants and animal matter. The subsoil is mainly mineral particles, with much less organic material. The fragmented rock/bedrock is primarily small stones, and beneath it lies all bedrock.
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Answer:
Inca, also spelled Inka, South American Indians who, at the time of the Spanish conquest in 1532, ruled an empire that extended along the Pacific coast and Andean highlands from the northern border of modern Ecuador to the Maule River in central Chile.
<span>1. nitrogen
</span>a biogeochemical cycle that cycles material by fixation, assimilation, ammonification, nitrification, denitrification, and the food chain <span>
2. phosphorus
</span>a biogeochemical cycle that cycles material by weathering, erosion, tectonic activity, and the food chain
<span>
3. tectonic
</span>a geochemical cycle that cycles material by mantle convection, subduction, and seafloor spreading <span>
4. carbon
</span>a biogeochemical cycle that cycles material by photosynthesis, respiration, and the food chain <span>
5. hydrologic
</span>a biogeochemical cycle that cycles material by evaporation, condensation, precipitation, and transpiration <span>
6. rock
</span>a geochemical cycle that cycles material by weathering, erosion, deposition, cementation, and metamorphism
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Answer:
Hornblende has <em>two</em> cleavage planes at <em>non-90°</em> angles.
The Northern Plains of India are very fertile due to the presence of alluvial soil. They also cover a very large area. Therefore, they have the potential to produce enough food for millions of people as long as sustainable farming practices are employed and there is use of high-yielding seeds as well as well-developed irrigation systems.
