
SOIL LEACHING PROCESSES
Authored by Henry Moseti
Geography
10th - 12th Grade
Used 15+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
i) Takes place in humid tropical areas with high temperatures and rainfall.
ii)During the wet season, soluble mineral salts in the top layer of the soil dissolve in water.
iii)The dissolved minerals such as silica and other bases are deposited further downwards to lower layers.(desilication)
iv)Insoluble minerals such as iron and aluminum accumulate in the top layers, to form a crust.
Ferralisation
Podsolization
Eluviation
Ribification
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
i)It occurs in cool climate areas where rainfall is more than evaporation.
ii)The areas experience severe leaching.
iii)Horizon ‘A’ is leached of all minerals including iron,aluminium and humus.
iv)This leaves behind soils which are grey-white or ash-like in color.
Podsolization
Calcification
Salinization
Illuviation
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mechanical washing down of minerals like clay from the upper layer into middle or lower layers. I.e. from Horizon A to B by percolating water.
Elluviation
Illuviation
Cheluviation
Calcification
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
i)Occurs where rainfall is lower than evaporation
ii)High evaporation moves minerals in solution form/results in the re-deposition of mineral from horizon ‘B’ to horizon ‘A’ .
Cheluviation
Elluviation
Illuviation
Salinization
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
i)Common in areas which experience dry conditions alternating with rainy seasons such as semi-arid areas.
ii)The soils are dehydrated during the dry season and leached during the rainy season.
iii)Soils formed have low moisture and are bright red in color.
Ribification
Calcification
salinization
Ferralisation
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
i) Occurs in areas where the amount rainfall is almost the same as evaporation rate.
ii)Therefore this results in the formation calcic horizon enriched with calcium compounds within the same profile as there is no movement of leached materials from one horizon to another.e.g. within B and C.
iii)This results in the re deposition of calcium compounds within the same profile.
iv)Its common in the continental interior where the surface is covered by limestone rock and receives very low rainfall.
Calcification
Podsolization
Ferrilization
Ribification
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
i)It occurs in areas with dry climate
ii)This process results in the soils being leached upwards through capillarity as evaporation is higher than rainfall.
iii)It involves enrichment of soil with salt as water is lost to the atmosphere through evaporation. The soils are saline.
Podsolization
Ferralisation
Salinization
Chelluviation
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