soils/biomes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| soil | a layer of natural materials on the earth's surface that is capable of supporting plant growth
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| compositon of soil | 25% air
25% water
45% mineral matter
5% organic matter
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| sandy soils | Large particles, some silt/clay, large pores, water drain freely.
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| silty soils | between clay and sand, quite fertile, smaller pore, when wet heavy/poorly drained
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| clay soils | small particles/stick together, waterlogged, sticky, very sticky, difficult to cultivate
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| loam soils | perfect soil, roughly equal sand,silt,clay. retains some moisture, free drained, very fertile
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| crumb structure | small, rounded grains, near surface, excellent for drainage and air movement
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| platy structure | thin, flat particles, overlap, compacted soil, impede roots, hold up movement of water
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| blocky structure | cube shaped particles, fit together, few pore spaces
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| low ph (below7) | acidic soil, heavily leached, lack minerals, usually infertile
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| neutral soils | PH level of 7
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| high ph (above7) | limey/high levels of calcium, develop on chalk or limestone region/desert or drought
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| humus | organic matter in soils that is formed from decaying organic matter such as fallen leaves, grasses, animal waste etc.
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| humus contrent | micro-organisms break down organic matter. makes soil look dark brown/black, reduce soil erosion, rich in nutrients
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| soil moisture | enables plant roots to recieve nutrients in solution, influenced bytexture and structure of the soil
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| brown/black soil | lot of humus/ very fertile
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| grey soils | 'washed out' humus/nutrients leached, poor drainage/waterlogged naturally infertile
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| red soils | presence of iron oxide, develop in regions warm/moist/tropical/equatorial climate iron breaks down and rusts low in nutrients/organic matter
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Created by:
keithdonagh10
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