Loamy soil have equal amount of gravel and clay particles? Is it correct?
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Loam: Soil comprised of almost equal amounts of sand and silt and a little less clay. Of the three components, sand particles are the largest. Sand does not hold onto moisture, but it provides good aeration. On the opposite end, clay particles are much smaller and easily compact. That makes clay a great material for building bricks, but not so great for allowing water, air, and plant roots through.
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Several
different types of soil are used to grow various species of plants.
Each soil has a different consistency, a different look and a different
balance of minerals, moisture and oxygen. Loam, for many reasons, is a
nutritious and healthy mixture that helps a diverse group of plants and
vegetables thrive.
FertilityPerhaps
one of the most defining characteristics of loam is its fertility. This
soil is moist, loose and full of biomaterial such as decaying worms and
microbes that can be recycled as food for plant life. Because of this,
loam soil is considered the best soil in which to grow vegetables,
garden fruits and flowers such as roses. Loam soil gets its nutritious
qualities from decaying insects and other animals and plants. When these
organisms decay, they release nutrients into the soil that are stored
as dry parts of the soil. Worms and other subterranean life mix the soil
and create passages where water can work. When it rains, the nutrients
in the soil are released and are soaked up by plants' root systems.
Physical MakeupLoam
is a mixture of sand, silt and clay. In fact, several variations of
loam exist and can be used to grow different types of plants and
vegetables. Standard loam is composed of approximately 40-percent silt,
40-percent sand and 20-percent clay. Other variations include silty clay
loam, which is made up of only 10-percent sand, 70-percent silt and
20-percent clay. The pH level of loam ranges, as different ingredients
are present in different proportions due to variations in the soil
composition, but the standard loam pH is between 5 and 7. This low level
of acidity is good for plants and vegetables, as it kills off some
forms of bacteria and microbial life that might otherwise attack a
plant's root system.
Other CharacteristicsLoam
soil appears rich and dark brown and is usually moist to the touch. You
can pick up loam and roll it into a ball, and it will crumble when
touched. This ability helps determine whether clay, silt and sand are
present in the correct proportions. When you run water over loam, you
will see that loam soil tends to drain very well and yet still retains
its characteristic moisture. This ensures that the plants have a healthy
base in which to grow without the roots being drowned under collected
water.
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