What has more humus topsoil or subsoil?
These are called organic matter or humus and contain the living and once living components of our soil. The more humus found in topsoil, the more nutrient rich the topsoil and the better the conditions for growing plants. The middle layer is called subsoil. This contains more clay and less organic matter.
Which type of soil is best for fertility?
To grow good crops, a farmer must improve soil fertility and structure….
| Soil type | Features | Methods of improvement |
|---|---|---|
| Loam | Mixture of sand, silt and clay | Maintain soil fertility with periodic application of fertilizer and compost |
Why is topsoil rich in humus?
Humus is the decayed remains of the plants and animals, which breaks down in the soil by the microbes. The microbes need oxygen and nutrients to breakdown the remains. Therefore, this happens more in the topsoil, than in any other soil layer. Thus, the top layer of soil has more humus than other layers.
Why does topsoil have most humus?
Topsoil has more humus because animals live in this layer and even roots of some plants are located in topsoil which brings loads of humus and important nutrients.
What are the factors that affect soil erosion?
The rate and magnitude of soil erosion by water is controlled by the following factors:
- Rainfall and Runoff.
- Soil Erodibility.
- Slope Gradient and Length.
- Cropping and Vegetation.
- Tillage Practices.
- Sheet Erosion.
- Rill Erosion.
- Gully Erosion.
What are 4 factors that affect erosion?
The most important erosion factors include the climatic, hydrological, topographic, soil, geological and vegetation conditions, as well as the economic and technical and the socioeconomic conditions of the human society.
What are the 4 factors that affect the rate of soil erosion?
Major factors that affect the amount of erosion are soil cloddiness, surface roughness, wind speed, soil moisture, field size, and vegetative cover.
What is the most important most influential factor in erosion?
Climate is perhaps the most influential force impacting the effect of erosion on a landscape. Climate includes precipitation and wind. Climate also includes seasonal variability, which influences the likelihood of weathered sediments being transported during a weather event such as a snowmelt, breeze, or hurricane.
What are the nine factors that aid erosion?
Factors that Influence or Cause Soil Erosion
- RAINFALL: Consistent heavy rains usually causes erosion of soil at a faster rate.
- TOPOGRAPHY: It refers to the extent to which a land slopes.
- PRESENCE OF ORGANIC MATTER IN SOIL:
- HUMAN ACTIVITIES:
- OVERGRAZING:
- DEFORESTATION: