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Resource: used or used up in processes

Magnesium

Appears in 12 processs and 19 steps. Everything below is linked: open a process to see it in context.

Top processes

Base cation cycling (calcium, magnesium, potassium, sodium)

7 steps

Clay mineral transformation sequence

2 steps

Cation exchange, pH and soil solution chemistry

1 step

Cations held on exchange sites (Ca, Mg, K, Na, NH4, Al, H)

Mineral weathering and parent material

1 step

Silicate hydrolysis releases base cations and silica, forms secondary clay

Soil sulfur cycling

1 step

Sulfate leaches with calcium, magnesium and potassium into drainage water

Nitrification-driven acidification of ammonium fertilised soil

1 step

Nitrate leaches with Calcium and Magnesium, leaving net acidity

Show 6 more processes

Soil CO2 and biotic enhancement of weathering

1 step

Plant uptake removes released cations, keeping solution undersaturated

Nutrient availability and leaching

1 step

Base cation cycling (calcium, magnesium, potassium, sodium)

Clay mineralogy and organic matter set cation exchange capacity

1 step

Higher CEC retains Ca, Mg, K and NH4 against leaching

Drainage, groundwater recharge and runoff (about 65 percent of rain returns to air, 35 percent runs off)

1 step

Percolating water flushes dissolved ions (calcium, magnesium, nitrate, bicarbonate) out of the profile

Chemical weathering: CO2-driven dissolution and CO2 consumption

1 step

Silicate hydrolysis: 2 mol CO2 consumed per mol Ca or Mg released, a net long-term sink

Biological weathering by roots, mycorrhizal fungi and microbes (plants speed weathering about 2-10 fold)

1 step

Mineral nutrients (K, Mg, Ca, P) are absorbed by hyphae and passed to the plant

Often found with

Calcium 17 Potassium 15 Clay minerals 5 Soil solution 5 Drainage water 5 Water 5 Plant roots 4 Silica 3 Clay minerals 3 Soil organic matter 2 Ammonium 2 Cations 2

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