To confirm: The CEC (cation exchange capacity) is a measurement of how much of a negative charge the soil contains (which is influenced by the make-up of the soil). This negative charge influences how many positively charged nutrient (element) ions the soil can attract, hold, and exchange. Nutrients are usable by plants when they are in their ionic form. Negatively charged soil elements will also repel negative nutrient ions (anions).
I think I'm two for two so far .
What happens to the anions and cations after they are repelled by or attracted to the soil. I'm thinking that both the anions and cations can be used by the plants, but that the anions that are repelled by the soil have a chance at being washed out, as opposed to the cations which are held.
Are the ionic nutrients ready to be used by the plants or do they still need to interact with the microbiological life forms? Maybe it is the interaction with the microbes that makes the nutrients ionic, I'm not sure on this one.
Toil, great information, especially about the small batches of compost tea. That will come in handy for when the seedlings start growing.
One thing I wonder about is the statement that an aquarium pump is only good for a gallon or two of tea. I find that hard to believe since that is what most people seem to use for a 5 gal. batch of tea, and the math that HG and I did a few posts (page or two) ago, seems to support this.
What's your opinion on this?