Your question requires a book to be answered fully. In short - Physically, soil must be able to support the plant and be capable of holding plant nutrients and water. Chemically, for the very great majority of plants, it must provide all of the nutrients required for plant growth.
Soil properties are important to measure if you intend to do something with or on a parcel of land.
A farmer might be interested in knowing if a piece of land can grow crops, and therefore would want to know the soil's fertility and pH, and other properties, depending on the crop.
A developer might be interested in knowing if the soil could support the weight of a building or road, without failing and causing a landslide or other disaster.
A home builder might be interested in whether a septic system would work on a piece of property.
For almost any land use, knowing the properties of that land is valuable.
Soil fertility.
soil composition, soil texture, and soil fertility
xtau
alluvial soil red soil black soil sandy soil
these are properties of soil that indicate the type and conditions of the soil and provide a relationship to structural properties
Yes, materials do change when physical properties are measured.
measured properties that have different values at different time are
soil properties basically is the void ratio, porosity, specific gravity, dry unit weight, saturated unit weight, liquid limit, plastic limit and shrinkage limit which play a important role to support load.
Soil fertility.
soil composition, soil texture, and soil fertility
wall floor
Volume
alluvial soil red soil black soil sandy soil
xtau
Porosity is measured by taking a sample of the soil. The sample is then tested to measure the speed of water passing through the soil.
alluvial soil red soil black soil sandy soil
these are properties of soil that indicate the type and conditions of the soil and provide a relationship to structural properties