Three factors that influence the development of soil structure ?

1. Parent material: The type of rock or sediment from which the soil is formed can greatly influence its structure. Different parent materials have different mineral compositions and physical properties, which can affect how soil particles bind together and form aggregates.

2. Climate: Climate plays a significant role in soil structure development. Factors such as temperature, precipitation, and humidity can impact the rate of weathering and decomposition of organic matter, which in turn affects the formation of soil aggregates and pore spaces.

3. Organisms: Soil structure is also influenced by the activities of soil organisms, such as earthworms, bacteria, fungi, and plant roots. These organisms help to break down organic matter, mix soil particles, and create pore spaces, all of which contribute to the development of soil structure.

1. Parent material: The nature of the parent material determines the initial composition of the soil. Different types of parent material will give rise to different types of soil structure. For example, coarse-grained parent materials such as sand tend to form soils with a loose structure, while fine-grained parent materials such as clay tend to form soils with a compact structure.
2. Climate: The climate of a region can also influence the development of soil structure. For example, in areas with high rainfall, the soil tends to be more leached and has a lower pH. This can lead to the breakdown of soil aggregates and the development of a more compact structure.
3. Vegetation: The type of vegetation that grows in a region can also influence the development of soil structure. For example, trees and shrubs have deep roots that help to create a more open and well-drained soil structure. In contrast, grasses have shallow roots that tend to create a more compact soil structure.