em soil

Classified in Geology

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EM tema 1
 1. Soil | 2. Humus | 3. Horizons | 4. Soil profile | 5. Top, Topsoil | 6. Below
WINDBREAKS: A method of conservation that consists on planting trees to protect the soil from wind and strong rainfalls. 
SOIL EROSION: The removal of the topsoil and its nutrients caused by the agents of erosion such as wind.
CLAY: It is a type of soil, it has small particles, its dense and soft.
PARENT MATERIAL: it is found below the c horizon and its what is found below the soils, when parent material is weathered, mineral particles are formed.
TRANSPORTED SOIL: soil that was transported from the horizon to other thanks to the agents of erosion. 
HORIZON C: its the horizon from the soil profile where weathered pieces of bedrock are usually found. 
50 9 41  ---- Silty Clay.
30 60 10---- Sandy Clay Loam.
20cl 35sa 45si  ---- Loam.

LOAM: It is the perfect soil for farming, where a huge variety of plants are able to grow. Its the only kind of soil that is not predominatly sand, silt or clay.
SANDY CLAY LOAM: Its a loam that features sand in a big amount, but has got  considerable amount of clay too, but almost no silt. The contrast between the high amount of sand and clay tell us that this type of soil has good pere space, aeration, absorption and drainage. This is because sand has the biggest particle size and claythe smallest one, so they complement farming a good soil for plants. 
SILTY CLAY: are light and moisture retentive soils very fertible. As silt soils compromise of medium sized particles they are well drained and hold moisture well. As the particles are fine, they can be easily compacted and are prone to washing away with rain. 

soil is where plants grow in. Some methods to conservate soil from leaching or soil erosion are: 
TERRACES: when crops are in a slope, terraces are used to make the water flow down. These are kind of paths that go down the slope so that water doesnt damage crops. 
WINDBRAKES: It consist of making a hole, where water from rainfalls is stared, to protect the crop area from floods.
CONTOUR PLOUGHING: it consist in making a hole where water from raingalls is  stared, to protect the crop area from floods.

RAINFOREST:  dibujo: (humus), (oxides), (weathered, bed rock)
The soil profile of the rainforest is similar to the taiga boime. In the firts horizon, theres a layer of humus, that contains the organic matter, that is ofter redish thanks to the iron oxide and some others that are mixed up with that but in a lower amoun, that are found in the b horizon. Finally, in the c horizon, there are pieces of rock that were weathered from bedrock that is found below.
The first horizon is composed by a black, thick layer of acid humus and few soil organisms. Then the Horizon A which is the topsoil, becomes sandy as some materials are washed out. In the same horizon we can find three small layers: one composed by organic matter redeposited, other by iron and the last one by aluminium. Also, there is lot of precipitation which results in leaching of clays, organic matter and oxides. In Horizon  B(subsoil) there is accumulation of clays stained by iron oxides. It goes over into a red or red-brown horizon.Also, there is a through flow of soil water, so it leads to loss of nutrients.In the last horizon, a bed rock is formed because of the weathered material

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