Physical And Chemical Structures Of Hematite Limonite
Soil formation factors
These are environmental factors, which determines the type of soils that are formed i.e soil colour, profile depth, chemical features and biotic characteristics. i) Parent material: Parent material refers to the type of rock material from which soil forms. It includes bedrock, transported (by water, wind or gravity) and deposited materials originated from rocks. Alluvial – transported by water Colluvial – dislodged and deposited by gravity
*** Soil is not necessarily formed from the underlining bed rock *** The parent material contributes to the physical and chemical properties of the soil, such as texture, pH, mineral content.
|ROCKS |CHRACTERISTICS …show more content…
This is the mass per unit volume of a dry soil sample. The volume includes the soil particles and pores spaces. Soils that are more compact usually have a higher bulk density that is having more soil particles and less pore spaces.
Low porosity = higher bulk density Compact soils = low porosity = high bulk density* Clay soil = generally low porosity Sandy soils = higher porosity
[pic] Activity: list the characteristics of soil with poor soil structure
|How does soil structure influence plant growth? |