Text interrelations between environment and humanity

Text 5. LAND USE
Land use involves the management and modification of natural environment or wilderness into built environment such as settlements and semi-natural habitats such as arable fields, pastures, and managed woods. Land use by humans has a long history, first emerging more than 10 thousand years ago. It also has been defined as "the total of arrangements, activities, and inputs that people undertake in a certain land type."
Text 6. LAND USE: ENVIRONMENT
Land use and land management practices have a major impact on natural resources including water, soil, nutrients, plants and animals. Land use information can be used to develop solutions for natural resource management issues such as salinity and water quality. For instance, water bodies in a region that has been deforested or having erosion will have different water quality than those in areas that are forested. Forest gardening, a plant-based food production system, is believed to be the oldest form of land use in the world. More recent significant effects of land use include urban sprawl, soil erosion, soil degradation, salinization, and desertification


Text 7. SOIL
Soil is a mixture of organic atter, minerals, gases, liquids, and organisms that together support life. Earth's body of soil, called the pedosphere, has four important functions:
 as a medium for plant growth  as a means of water storage, supply and purification  as a modifier of Earth's atmosphere  as a habitatfororganisms All of these functions, in their turn, modify the soil and its properties. Soil is also commonly referred to as earth or dirt; some scientific definitions distinguish dirt from soil by restricting the former term specifically to displaced soil.
Text 8. PHYSICAL PROPERTIES OF SOILS
Let`s talk on physical state of soil. The physical properties of soils (be) aretexture, structure, density, porosity, consistency, temperature, colour and resistivity.Most of these … (determine) the aeration of the soil and the ability of water to infiltrate and to be held in the soil. Soil texture … (be, determine) by the relative proportion of three kinds of soil particles. They are called soil "separates": sand, silt, and clay. The main measure of soil density, particularly bulk density … (be) a soil compaction. So the soil porosity … (consist) of the part of the soil volume occupied by air and water. Consistency … (be) the ability of soil to stick