Soil Flashcards
What are the factors of soil formation? (5)
1.climate
2.topography
3.parent materials
4.biological factors
5.time
How many soil texture are there?
3
1.Sand - sandy soil
2.Slit - loam soil
3.clay - clay
what are the largest particles of soil?
sand
what are the smallest particles of soil?
clay
Component in soil in percent?
inorganic matter 45 %
Air 25%
water 25%
organic matter 5%
This soil factors affects the rate of weathering of rocks and the decomposition of organic matter
climate
This soil factors. It control the runoff water and how much soil material is eroded or deposited in an area
Topography
-coarse-grained texture
-not suitable for farming
-contains a high ratio of sand
Sandy soil
-almost the same ratio of sand and slit, with a little less clay.
-medium-grained texture.
-fertile & suitable for farming
Loam soil
-find-grained texture.
-particles stick together
-high ratio of clay
clay soil
(c)
-high organic matter content
- mostly dark- colored rocks and minerals
Dark brown / black soil
(c)
-washed out (bleached)
-rain water washes out most of the nutrients in soil
-leaves mostly sand
White / light gray soil
(c)
-lets water through it easily
-has high amount of iron oxides
-found in high elevations (hills or mountain)
Yellow / red soil
(c)
-submerged in water for a long periods of time
-high iron content
-result in reaction between iron and dissolve oxygen to form new compounds.
Blue-gray soil
how many color are there of soil?
4
1.dark brown
2.White or light gray
3.yellow or red soil
4.blue-gray soil
