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Topsoil is composed of mineral particles and organic matter and usually extends to a depth of 5-10 inches (13–25 cm). Together these make a substrate capable of holding water and air which encourages biological activity.
Doug Campbell was an agricultural academic concerned about soil erosion. He had been suggesting the spread of both seed and fertiliser for erosion control and aerial spreading of trace minerals since the 1930s, but had not conducted trials until he met Prichard. Campbell brought official backing and academic responsibility to Prichard's work.
A spreading ground in California, circa 1917. A spreading ground is a water conservation facility that retains surface water long enough for it to percolate into the soil. Spreading grounds must be located where underlying soils are permeable and connected to a target aquifer. [1]
The specific spreading of fertilizer is also known as aerial topdressing in some countries. Many countries have severely limited aerial application of pesticides and other products because of environmental and public health hazards like spray drift ; most notably, the European Union banned it outright with a few highly restricted exceptions in ...
A soil stockpile is formed with excavated topsoil during the construction of buildings or infrastructure. It is considered to be an important resource in construction and ecology . [ 1 ] [ 2 ] Soil is stockpiled for later use in landscaping or restoration of the region following the removal of construction infrastructure. [ 3 ]
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