Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural...
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Transcript of Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural...
![Page 1: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/1.jpg)
Unit 4Unit 4Soil ScienceSoil Science
![Page 2: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/2.jpg)
Importance of SoilImportance of Soil
• What is soil?• Holds water and nutrients for plants• Natural filter• Stores and recycles nutrients• Fertile soil = higher yields• Erosion
![Page 3: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/3.jpg)
Soil FormationSoil Formation
• 5 Factors– Parent material– Climate– Biological factors– Topography– Time
![Page 4: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/4.jpg)
Soil ProfileSoil Profile
• O = organic matter or humus
• A = organic and inorganic
• E = little organic matter due to eluviation
• B = leached or washed materials
• C = parent material
![Page 5: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/5.jpg)
Organic and Inorganic Organic and Inorganic SoilsSoils
Organic SoilsComposed mostly of
decayed plant and animal
matter
Inorganic SoilsComposed mostly of minerals
![Page 6: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/6.jpg)
Soil Types and TextureSoil Types and Texture
![Page 7: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/7.jpg)
Soil pHSoil pH• Affects how nutrients
and chemical are absorbed by plants
• Some plants like more acidic soil
• Others prefer a more basic soil
• How is soil pH changed?
![Page 8: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/8.jpg)
Water and Nutrients in Water and Nutrients in the Soilthe Soil
Sand
Sand
SandSand
SandSilt
Silt
Silt
Silt
Silt Silt
Silt
Silt
Clay
Clay
Clay
Clay
Clay
Clay Clay
ClayClay
Clay
Clay
Clay Clay
Clay
Clay
Clay
Clay
Clay
ClayClay
Clay
• Large pore spaces allow water and nutrients to move quickly• Small pore spaces tightly hold onto
water and nutrients
![Page 9: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/9.jpg)
Soil ErosionSoil Erosion
• Topsoil• Nutrients are lost• Water erosion• Wind erosion• Management– Crop rotation– Cover crops– Rotational grazing– Tillage practices
![Page 10: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/10.jpg)
Soil EcosystemsSoil Ecosystems
• Plants
• Burrowing Mammals
• Arthropods
• Earthworms
• Microorganisms
![Page 11: Unit 4 Soil Science. Importance of Soil What is soil? Holds water and nutrients for plants Natural filter Stores and recycles nutrients Fertile soil =](https://reader030.fdocuments.us/reader030/viewer/2022032605/56649e755503460f94b75bf3/html5/thumbnails/11.jpg)