plants are important to people because they:
DESCRIPTION
provide oxygen to animals. are a source of food. provide fiber which is used for fabric. provide shelter, roofing, and building materials. produce by-products such as dyes, decorative bark. may be used to alter the local environment. produce medicinal chemicals. - PowerPoint PPT PresentationTRANSCRIPT
313.T1
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Plants are important to people because they:
• provide oxygen to animals.
• are a source of food.
• provide fiber which is used for fabric.
• provide shelter, roofing, and building materials.
• produce by-products such as dyes, decorative bark.
• may be used to alter the local environment.
• produce medicinal chemicals.
313.T2
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Ways in which Plants Alter their Environments
• Shade.
• Windbreaks.
• Erosion control.
• Noise control.
• Reduction of glare.
• Beautification.
• Production of nitrogen in legumes.
• Act as settling chambers for pollutants.
313.T3
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Shade
• Reduces loss of soil moisture by cooling the soil.
• Reduces local air temperature.
313.T4
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Windbreaks
• Reduce soil moisture loss by reducing evapo-transpiration.
• Warm areas in cool weather by reducing the wind chill factor.
• Prevent soil erosion.
313.T5
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Erosion Control
• Roots capture soil particles as they wash across the surface of the ground.
• Leaves capture and slow rain water so soil particles are not so easily dislodged.
313.T6
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Noise Control
• Plants block sound waves from noisy streets, railroads, or buildings.
313.T7
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Reduction of Glare
• Plants absorb and soften sunlight.
• Plants shade areas to reduce glare from sidewalks, streets, and buildings.
313.T8
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Beautification
• Plants help to make areas more attractive.
313.T9
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Production of Nitrogen in the Soil
• Soil micro-organisms coexist with legumes to make nitrogen for the host plant, as well as other nearby plants.
313.T10
Model Agricultural Core Curriculum: SupplementUniversity of California, Davis
Importance of Plants to Man
Plants Act as Settling Chambers
• Plants absorb particulate pollution (pollution which is in particles) and hold them within themselves .