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Astrid Rangel
Mariana Álvarez
Emilio Marcos
Jose Humberto

Chemical composition

-Chalky soils are mainly made of calcium carbonte, which has an alkaline pH. Its pH is between 7.1-8.0.
It is a soft, white, porous sedimentary carbonate rock, a form of limestone composed of the mineral calcite. Calcite is an ionic salt called calcium carbonate or CaCO3 - It forms under reasonably deep marine conditions from the gradual accumulation of minute calcite shells.

Importance

-In agricultural limestone is a soil additive made from pulverized limestone or chalk. Some effects of agricultural limestone, are:
1. Soil acidity is reduced and alkalinity increased.
2. Provides a source of calcium and magnesium for plants.
3. It permits improved water penetration for acidic soils.

Plants that grow in chalky soil include:
Ceanothus
Campanula
Clematis
Dianthus
Geranium
Lavandula

References

Can somebody help me to understand the chemistry of my garden please? : Grows on You. (n.d.). Retrieved November 16, 2016, from http://www.growsonyou.com/question/show/121800

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Definition: Stony soils is the ground that contains lots of stones and rocks.

Chemical composition:Siliceous stone has as its main element, silica, or silicon dioxide (SiO2). Most stone from volcanoes is siliceous.

Argillaceous stone has as its main element alumina AlO2). It, along with its compounds, comes from feldspar in the crust.

Calcareous stone is made up mostly of calcium carbonate (CaCO3), or lime. Lime comes from the bodies of sea creatures, whose skeletons have accumulated at the bottom of the seas.

Importance: Rocks are problematic not just because they make working the soil challenging but also because rocky soil tends to have fewer nutrients than other soils and holds water poorly.

Crops:Common Bearberry,Bellflower, Columbine
and Candytuft

-Jasmin Salazar
-Marcelo Hernandez
-Sahiana Saenz
-Carolina González

References:
Stone and Masonry - Chemical Composition. (n.d.). Retrieved November 16, 2016, from http://science.jrank.org/pages/6523/Stone-Masonry-Chemical-composition.html

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Sandy, Loan and Clay
https://www.youtube.com/watch?v=uS7zfeK4OTQ

Paola Gzz

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Fernando, Alberto, Iván Franco, Renée

Definition:
Type of soil that has a high percentage of fine particles and colloidal substance. It becomes sticky when it is wet

Chemical composition:
The sheet units have the chemical composition (Al,Si)3O4

Importance:
The soil structure depends on the clay, since it retains nutrients in soil, reacts with H and Al ions, while buffering the soil against the extreme pH changes.
Also it may be a source of nutrients when it degrades.

Soils with few clay have simple structures while soils with more clay have complex structures and a multimodal pore-size distribution.

References:
Newman, A. (1984, June 14). The Significance of Clays in Agriculture and Soils. Retrieved November 16, 2016, from http://rsta.royalsocietypublishing.org/content/311/1517/375
Clay soil | definition. (n.d.). Retrieved November 15, 2016, from http://www.merriam-webster.com/dictionary/clay soil

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Importance According To Their Functionality

It is different from other composts and organic fertilizers because it´s decomposition process is more advanced; this is because of the level of fungi and bacteria.

Contains a range of microorganisms that break down plant waste and help roots absorb nutrients from the soil.

Crops That Can Grow There

Any kind of plant can grow here because it has enough nutrients.
But mostly crops like: Fruits, Potatoes, Legumes, Rootcrops, Leafy Vegetables, etc....

Watch this video to learn more about humus!

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importance of humus in the soil  lagrangroup ltd

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Uploaded by KILIMO SASA AGRIFILMS on 2015-12-10.

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Sandy Soil // Paola González, Brenda Díaz, Hannia Gómez, Diego García //

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Sandy Soil // Paola González, Brenda Díaz, Hannia Gómez, Diego García //

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Definition: soil comprised of particles that are larger than 0.05 millimeters and smaller than 2 millimeters. They are granular soils that contain small rock and mineral particles.

Chemical Composition: Sandy soils are the result of the weathering and disintegration of a variety of rocks such as granite, limestone and quartz. The components of the sand may vary depending on the conditions.

Importance according to their functionality: Sandy soil is important for growing vegetables and fruits because it drains well. Plant root systems cannot spread well in dense, heavy clay soil. Sandy loam is the description often given for optimum garden soil.

Crops that can grow there: Although easy to cultivate and work, light sandy soils dry out quickly and are low in nutrients. When gardening on sandy soil it is important to select plants that will be happy in dry, infertile soils, as other plants will depend on expensive and environmentally questionable heavy watering and feeding. Our top 5 plants for sandy soils Lavandula, Geranium ROZANNE 'Gerwat' AGM, Buddleja, Verbena bonariensis, Choisya ternata AGM

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Lucía, Montserrat, Sofía, Karla.

Humus is a fertilizer that emerges naturally in any type of soil in severe quantities but very helpful and healthy. Humus soil promotes plant growth in a many ways.

Chemical Composition

It is made up almost entirely of decomposed plants and other organic materials. It provides most of the nutrients plants need along with trace amounts of metals and minerals. Humus is the most nutritious component for soil. Containing necessary fats, proteins and sugars.

It supplies nitrogen, phosphorus, potassium and magnesium to soil and plants.

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Andrea, Barbara, Karen, Carlos

Definition: As the name says, it is a mixture of different soil types such as sand, rock, clay, peat moss, etc.

Chemical composition: Its main components are inorganic and organic components. For example, every single single organism that is in the process of decay that come from a living thing or inorganic that is components that come from nonliving things like rocks

Importance: The importance of mixed soil is that it has more vitamins and different components than regular soils which help with the cultivation of a big variation of plants. This type of soil nourishes plants.
Besides mixed soil has a surface of plant residues that protects it from: rain, sun, and wind.

Crops that can grow there: Lettuce, chard, snap beans,rice because it holds water. Brussels sprouts and cabbage

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Teresa, Yatziri, Nancy
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