Look at the following pictures carefully What are
- Slides: 18
Look at the following pictures carefully
What are your thoughts on these pictures
Physical & Chemical Properties of the soil
Soil (1) Physical Properties This relates to the physical characteristics of the soil. eg. Colour, feel, touch, particle size (2) Chemical Properties These are properties associated with the organic and inorganic particles of the soil. These are properties we cannot see and need to go into a lab to test. Eg. Minerals, Soil p. H, organic matter.
SOIL Physical Properties • Colour • Texture • Structure • Porosity • Permeability • Capillarity • Swelling & Shrinkage Chemical properties • Organic matter (manure) • Soil minerals • Soil p. H
Soil Colour The colour of the soil will determine how fertile of infertile the soil is Question infertile in le rti fe fertile fe r til e Of these two soil types which one is fertile ? Why ?
Soil Texture This refers to how the soil feels Dry - Gritty, rough, coarse, granular, fine, grainy. Wet - Smooth, slippery, sticky, muddy A Ribbon Test (forming a ball) when the soil is wet to determine the type of soil
Soil Texture This refers to how the soil feels Sandy Soil § Gritty § Fine & coarse § rough § Granular or Grainy § Do not form a ball when wet
Soil Texture Clayey Soil § Hard (dry) § Sticky (wet) § Fine grainy (dry) § Slippery (wet) § Smooth (wet) § Forms a ball very easily when wet
Soil Texture Loam soil (mixture of sand & clay) § smooth & fine §Sticky (wet) § soft and grainy § Slippery (wet) § Does not forms a ball that easily when wet
Soil Structure This refers to how the soil particle are put together to form the soil A soil particle is the smallest element (speck, spot) found in the soil Example of soil particle § Blocky § Platy § Granular
Soil Texture Characteristics Soil Type Sandy Soil Clayey Soil Loam Soil Texture Gritty Rough Fine & coarse Granular & grainy Do not form a ball when wet Hard (dry) Fine & grainy (dry) Smooth (wet) Sticky (wet) Slippery (wet) Forms a ball very easily Smooth & fine Soft & grainy Sticky (wet) Slippery (wet) Does not form a ball that easily when wet
Problem Solving Activity Farmer Brown recently brought a piece of agricultural land in Caroni to plant patchoi, lettuce and other short term crop. However, he observed that the land floods very easily and is usually very muddy when rain falls. His Agricultural officer has informed him against planting any vegetable or short term crop on the piece of land. Advised farmer Brown on what type of crop should be planted on his land? üRice ü Dasheen
HFLE Activity Is the soil a part of the environment ? Design a poster informing your friends about different ways in which you can preserve and protect the environment/surroundings YES