Science Project  D D
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Science Project D D

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Science Project D D Presentation Transcript

  • 1. Soil By:Dakota Hernandez
  • 2. What is soil made of? • Soil is made of sand, silt, and clay.
  • 3. Sand • The sand in the soil is the largest particle in the soil. • If you ever test or feel the texture of soil the rough part is sand. Sand has sharp edges. • Sand doesn’t hold many nutrients. • Their excellence drainage characteristics make them good for dairy farming. • Sandy soils are also good for crops like watermelon, peaches, and peanuts.
  • 4. Silt • Silt has a size between sand and clay. • Silt is smooth and powdery. • Silt is easily transported by water. • Silt creates rich and fertile soil.
  • 5. Clay • Clay is the smallest particle. • Clay is smooth when dry and it is sticky when it is wet. • Clay can hold lots of nutrients but does not let air and water through easily. • Clay hardens when dry. • Clay is formed by chemical weathering of rocks.
  • 6. Particle size • Particle size has a lot to do with the soils drainage and nutrient holding capacity. Here is a picture to better help you understand the sizes of the three particles.
  • 7. Graph • This graph can help us figure out what kind of soil we live in. • Example: if you have 50% sand and 30%clay you would have sandy clay loam.
  • 8. References • http://en.wikipedia.org/wiki/Sand • http://en.wikipedia.org/wiki/Soil • http://en.wikipedia.org/wiki/Clay • http://en.wikipedia.org/wiki/Silt • http://www.oneplan.org/Water/soil- triangle.asp • http://urbanext.illinois.edu/gpe/case2/ c2facts2.html • http://www.ncagr.gov/cyber/kidswrld/