Cation-exchange capacity (CEC)
{"Image DocumentName": "Cation-exchange capacity (CEC)", "Image ImageDescription": "\u2022The cations bound to the clay structure are not permanent as they can be exchanged. Clay-\u2212Na+(s) + H+(aq) \u21cc Clay-\u2212H+(s) + Na+(aq) \u2022Cation-exchange capacity (CEC) is defined as the amount of the single-positive cations that can be exchanged with the soil solution, per Kg of clay. If the clay contains Mg2+ or Al3+, the replacement of these ions increases the negative charge of the soil and CEC increases. CEC values range from 0.03 for kaolinite up to 1.5 for vermiculite clay. Most soils only contain small fraction of clay, so CEC\u2019s for soils range from 0.02 \u2013 0.60.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}