By: E Wondra

NC State University Agronomy

Agronomy is people who are interested in agriculture, work to preserve are farm land and are natural resources. Wouldn't it be SO sad if are future generation didn't have natural resources we have now or good soil to grow healthy food! the population has incenses so in result the food demand has gone up. more than 5 million kids die every year die from starvation. We can change this be an agronomist .
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  • The erosion or disintegration of rocks
  • caused by chemical reactions
  • carbonation is a type of chemical weathering
  • carbonation is the mixing of water with carbon dioxide to make carbonic acid
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  • The process of breaking big rocks into little pieces
  • process usually happens near the surface of the planet
  • The cool nights and hot days always cause things to expand and contract this can cause rocks to crack
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Soil composition

  • complex mixture of different materials
  • soil is a mixture of broken rocks and minerals living and non living organisms
  • 45% of soil is made up of mineral particles
  • 25% is made up of water
  • the last 5% of soil is made up of organic materials

Soil Texture

The texture of soil is determined by the percentage of sand silt and clay

  • clay=soft
  • silt=soft
  • sand=grainy
  • gravel=bumpy/rough

Soil Horizons

A soil horizon is a layer generally parallel to the soil crust. The physical characteristics are different from the layers above and beneath. Each soil type is different.

The 4 mail layers

  • topsoil (the layer on the top)
  • subsoil (the second layer under the topsoil)
  • humus (the third later under the subsoil)
  • bedrock (the layer on the very bottom)
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Bill Nye The Science Guy on Rocks & Soil (Full Clip)

Rate of soil formation

  • soil formation requires weathering the more weathering the thicker the soil less weathering thin soil
  • it can take 1000 year to produce 1 inch of fertile soil
  • soil forms quicker in warm wet climates
Soil Formation for Kids

Remote sensing

Remote sensing is the science of obtaining information about objects or areas from aircrafts or satellites

Remote sensing collects data by detecting the energy that is reflected from earth.

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How is it used to study humans impact on the soil

Accurate measures of human effects on landscape processes require consideration of both the direct impacts from human activities and the indirect consequences of the interactions between humans and the landscape.

Soil impotance

  • Soil is SO important
  • Soil is not just dirt it is critical to humans survival
  • it grows are food cleans the water and air
  • Organic matter in various stages of decomposition
  • It has a distinct effect on the availability of essential nutrients

Misuses of soil and negative effects on humans

  • pollution
  • not having a compost pile
  • farming over the hill not around
  • plant the same crops in thew same place every year
  • when we don't try to conserve soil it effects are water air and food!!!!!!!!

Soil stewardship and advantages in the field of agronomy

  • travel to different place to study soil
  • get to work in nice sunny weather
  • Farm records can be maintained easily.
  • Better use of land
Soil Layers Song
Soil layers song by: Mr. Parr