Definition of Land
Soil soil is a layer that occupies the top of the earth's crust consisting of solid "inorganic and organic material" and soil water and air. Land has been known since the beginning of human civilization, especially after humans use land for farming in an effort to meet their needs.
Understanding Land According to Experts
Here are some definitions of land according to experts, including
According to JJ Berzelius "Sweden, 1803"
Soil is as a chemical laboratory where the process of decomposition and chemical reactions that take place is hidden.
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Menurut Justus Von Liebig "Jerman, 1840"
Proposing the theory of plant nutrient balance "theory balance plan naturation" which considers the soil as a test tube where can be known the number and type of plant nutrients.
According to Friedrich Fallou "1855"
Soil is considered as the result of weathering by time which eats away hard rock and gradually decomposes.
Understanding land must be connected with climate and can be described as broad geographic zones, which on a world map scale are not only associated with climate, but also with the plant environment.
According to US Thaer "1909"
The surface of the planet consists of crumbs and loose material called soil, which is the accumulation and mixture of various materials, such as elements; Si, Al, Ca, Mg, Fe and others.
According to Humphry Davy "England, 1913"
Soil is a natural laboratory that provides organic matter for plants.
Menurut CF Bound "Rusia, 1914"
Soil is the outermost layer of the earth's crust which is usually unified and has thick properties ranging from thin membranes to more than 3 meters which differ from the material underneath it in terms of; color, physical properties, chemical properties and biological characteristics.
According to Ramman "Germany, 1917"
Soil as rock material that has been broken down into small particles that have changed chemically together with the remnants of plants and animals that live in and above it.
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According to Werner "1918"
The soil is a thin black covering of dry solid material, consisting of small debris particles and remnants of vegetation and animals. Land is a medium for plants.
According to Alfred Mistscherlich "1920"
Soil is a mixture of solids that are small particles of water and air that absorbs nutrients and can grow plants.