Circulation Of Nutrients

Circulation of Nutrients ,[object Object],[object Object]

The role of soil in decomposition ,[object Object],[object Object],[object Object],[object Object],Dead/Decaying organisms, parts of organisms, faeces and urine derived from weathering of rocks. Type determined by relative proportions of SAND , SILT and CLAY particles very important agriculturally.

The structure of soil ,[object Object],Organic litter : plant/animal debris Topsoil containing humus : roots, invertebrates, micro-organisms Leaching of nutrients from the soil Subsoil : rich in minerals & organic material, some roots Weathered rock : sand, gravel, clay Impermeable Bedrock

Soil fauna ,[object Object],[object Object],[object Object],[object Object],[object Object]

Rhizosphere ,[object Object],[object Object],[object Object]

Decomposers and Detritivores ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Detritus Food Chain ,[object Object],[object Object],[object Object]

Decomposition ,[object Object],[object Object],[object Object],[object Object]

Humus ,[object Object],[object Object],[object Object],[object Object],[object Object]

Mineralisation ,[object Object],[object Object],[object Object],[object Object]

Rate Of Decomposition ,[object Object],[object Object],[object Object],[object Object]

The Carbon Cycle Carbon is removed from the atmosphere by fixation during photosynthesis and returned by respiration, decomposition & burning fossil fuels

The Nitrogen Cycle ,[object Object],[object Object],[object Object],[object Object],Water saturation of the soil affects the cycling of nitrogen. i.e.  H 2 0 =  O 2 anaerobic/aerobic affect different stages of cycle

The Phosphorus Cycle ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],1 2 3 4

Circulation Of Nutrients

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Circulation Of Nutrients