Learn: Physical properties of soil to plants to maintain their growth., a layer of soil, define physical properties of soil,
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Physical properties of Soil of plants to maintain their growth
- Soil is a medium which provides support, nutrients and oxygen to the plants.
- Soils keep water stored and supply slowly to plants to maintain their growth.
- Soils also provide the necessary porosity which is essential for the growth of the plant.
- Large depths of soil do not carry any importance for an Agronomist.
- He is mainly concerned with the upper crust of the soil, which is primarily used for growing crops.
- This upper crest retains water and furnishes it for plant growth.
- The water retained in the upper crust is also termed as the belt of soil water.
- The depth of the belt of soil, water depends upon, the type of soil and vegetation.
- The depth of this belt may extend from a meter to several meters below the surface.
- An Upper layer of soil contains, air, minerals, free carbonates besides moisture.
- This layer may also contain the remains of plants and animals at various stages of decomposition.
- Bacteria, fungi, protozoa, worms and insects etc.
- Are the forms of plant and animal life.
- All the soils are the resultant of the disintegration of rocks.
- The resulting soils may have the same mineral composition as that of parent rock or different because of the changes brought about by water,
- Carbon dioxide and organic materials.
- The particle size of the soil may vary from very fine clay particle to as large as a boulder size.
- Physical properties as given above affect the fertility of the soil and growth of the plants.
- The supply of food to the plant is also related to the physical properties of the soil.
- The most important physical properties of the soil, which markedly affect the growth of the plant are soil texture and soil structure.
- According to grain size, the soils may be classified as clay, sand and silt.
- Agriculture classified various soils with the help of Triangular Texture Diagram shown in Fig.
- All the soils classified by this method contain varying percentages of clay, sand and silt.
- If the percentages of clay, sand and silt for a particular soil are given it can be easily classified using this diagram.
- Soil structure refers to the arrangement of the soil particles.
- Soil structure depends upon shape, composition and electrical properties of soil particles.
- There are so many other parameters which also affect the soil structure.