Main CycleMore Info Fertilizer Ca(NO 3 ) 2 CaSO 4 *2H 2 O All P Fertilizers Lime CaO, Ca(OH) 2 CaCO...

Main Cycle More Info

FertilizerCa(NO3)2

CaSO4*2H2OAll P Fertilizers

LimeCaO, Ca(OH)2

CaCO3

CaMg(CO3)2

OtherShellsSlagMarl

Moisture

OFF

ONDissolution

pH of Soil

Temporarily held on exchange sites, but tightly held on charged soils

Calcium MineralsLime, Calcite, Dolomite, Gypsum, Florapatite, Plagioclases, Gabbro, Basalts

LeachingCaCl2, CaSO4

Major Form

Moisture

OFF

ON

Plants

Animals

ON

OFF

Mining

Weathering(dissolution)

Decomposition of Plantand Animal Residues

Ca2+ removed As plant matter 4x in leaves vs. grain


Uptake decreases withPresence of high Al3+

Higher availability of Ca2+

Improves uptake of NH3 Soil Microbes

Click on ON or OFFTo see how the cycleIs effected by moisture

Calcium Cycle

Authers:Jason Warren, James Johnson, Derrel White, Lori Gallimore and Micah Deleon


FertilizerCa(NO3)2


LimeCaO, Ca(OH)2

CaCO3

CaMg(CO3)2

OtherShellsSlagMarl

Moisture

OFF

ONDissolution

pH of Soil




Major Form

Moisture

OFF

ON

Plants

Animals

ON

OFF

Mining



Main Cycle

Movement of calciumIn the presents of moisture

Moisture



Soil Microbes


Improves uptake of NH3


FertilizerCa(NO3)2


LimeCaO, Ca(OH)2

CaCO3

CaMg(CO3)2

OtherShellsSlagMarl

Moisture

OFF

ONDissolution

pH of Soil




Major Form

Moisture

OFF

ON

Plants

Animals

ON

OFF

Mining




Dissolution of Fertilizer,Lime and Other sources of Ca2+ can not occur




Improves uptake of NH3 Soil Microbes


More Information on Calcium

Effect of pH on availability:

Sources of Calcium:

References:

Form taken up by plants:

Mobility in soil:

Mobility in plant:

Role of nutrient in plant growth:

Role in microbial growth:

Concentration in plants:

Content present in soils:

Deficiency symptoms:

Interactions with other nutrients:

Main Cycle

Mayo Clinic about Calcium and Osteoporosis


More Info. on Calcium

• Form taken up by plantsCa+2

• Mobility in Soil

No, slight mobility in soil solution • Mobility in plant

Movement occurs in xylem to the leaves (one way ticket)

Main Cycle



• Role of nutrient in plant growth:

Required for cell wall rigidity, cell division of meristems and root tips, normal mitosis, membrane function, acts as a secondary messenger, aids in storage of phosphates in vacuoles, actively involved in photosynthesis and found in the endoplasmic reticulum

• Role in microbial growth:Needed for Rhizobium and Azotobacter




• Interactions with other nutrients: – Since Ca+2 is so directly related to pH in solution, it

effects all of the other nutrients. When NO3-N is applied to soil, Ca+2 absorption increases in the plant. Increases in Ca+2 in soil decreases Al+3 in acid soils, as well as decreasing Na+ in sodic soils. Increases in Ca+2 taken up by plants cause deficiencies of Mg+2 and K+. MoO4

-2 and H2PO4-

availability increases with increases in Ca+2 concentrations.



• Concentration in plants:– Fresh weight of plants typically contains 0.1-5.0%,

can contain up to 10% dry weight in leaves before plant experiences toxicity

• Deficiency symptoms:

– First seen in the younger leaves of plants, loss in plant structure, under extreme deficiencies gel-like conditions, root development no longer takes place, stunted plant growth



• Content present in soils:– Tropical soils: 0.1-0.3%– Temperate soils: 0.7-1.5%– Calcareous soils: >3.0%– Largely dependent on parent material of soil and

rainfall



• Effect of pH on availability:Depends on mineral

• Sources of Calcium: – Lime (CaO) (Ca(OH)2), Calcite (CaCO3), Dolomite

(CaMg(CO3)2, Gypsum (CaSO4.2H2O), any

Phosphorus fertilizer, Anorthite (CaAl2Si2O3),

biotite, apatite, augite & hornblende.


More Info. On Calcium

• ReferencesAmjad, Z. (ed.) 1998. Calcium Phosphates in Biological and

Industrial Systems. KlowerAcademic Press. Boston, MA.Lindsay, W.L. 1979.

Chemical Equilibria in Soils. John Wiley & Sons. New York, NY. pp. 86-102.

Marschner, H. 1995. Mineral Nutrition of Higher Plants. Academic Press. New York, NY. pp. 285-298.

Tisdale, S.L., Nelson, W.L., Beaton, J.D. and Havlin, J.L. 1993. Soil Fertility and Fertilizers. Macmillan Publishing Company. pp. 289-296.


Main CycleMore Info Fertilizer Ca(NO 3 ) 2 CaSO 4 *2H 2 O All P Fertilizers Lime CaO, Ca(OH) 2 CaCO...

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