Cation exchange capacity
From BonsaiWIKI
(Redirected from CEC ratio)
Cation exchance capacity is a measure of a soil's capacity to retain nutrients. Low CEC means that the soil has less ability to hold positively charged ions, such as manganese, iron and potassium.
CEC depends on the texture of the soil and how much organic matter is in it. Clay soil have tiny particles with a high ratio of surface area to volume.
As an example, the chart below shows the basic relationship of Soil type to CEC
SOIL TYPE CEC Sand 5-20 Akadama 21 Clay 20-50 Organic Soil 50-100
[edit]
Links about CEC
- http://www.microsoil.com/CEC.htm
- http://www.extension.umn.edu/distribution/horticulture/components/1731-06.html
- http://www.zeoponix.com/cationexchange.htm
- http://www.citygardening.net/CEC/
- http://soils.tfrec.wsu.edu/webnutritiongood/soilprops/04CEC.htm
| Fertilization Terms |
| Fertilization: Foliar fertilization | Fertigation | Feeding | CEC ratio | overfertilization | fertilizer deficiency |
| NPK: Nitrogen (nitrate ammonium and urea) | Phosphorus | Potassium |
| Minors: Boron | Chlorine | Chromium | Copper | Iron | Manganese | Magnesium | Molybdenum | Sulphur | Zinc |
| Organic fertilizer: Fertilizer cake | Fish emulsion | Seaweed extract | Bat guano | Bone meal | Blood meal | Biogold | Cottonseed meal | Fish Meal | Chicken Manure | Cow Manure | Soybean Meal | Alfalfa Meal |
| Misc: Epsom Salts | Rock Dust | Gypsum |
| Inorganic fertilizer: Miracle-Gro | Miracid | Osmocote | Dyna-Gro |
| pH: Acidity | Alkalinity | Chlorosis | Vinegar | Lime |
