Electrical conductivity and oxygenation
The electrical conductivity (EC) is a factor which greatly influences the growth of plants cultivated outside 
soil.
The majority of the nutrients in commerce has a formula that allows solutions with EC rather low (less than 3.0 dS / m).
Following tables with dosages on the label, and using quality products, it is impossible to go wrong in the preparation of nutrient solution.
The real problems arise such as when very hot and dry the water evaporates in large quantities, leaving the roots immersed in a concentrated fertilizer and salts, with an EC suddenly jumped to the stars.
In this case it is a must run for cover, restoring balance, and it will be necessary to add water, and measure the EC ensured that it was brought back to levels more consistent.
When you reuse a partially exhausted solution, we must pay attention, especially when using mediums like coco or rockwool, which hold several salts.
Always measured in the EC entry, ie from the dripper or from the tank, and the output, after passing through the substrate.
This helps you understand if your slabs are saturated and must be rinsed or replaced.
Do you think that a CI is abbastaza to ensure optimal nutrition for your plants?
In reality it is a good start, but not enough, another factor is lurking: oxygenation.
Without an adequate amount of oxygen the roots absorb only a small percentage of what we administer them. The measurement result will be an EC always in the ranks, but plants are suffering.
The solution is simple drip systems, where you just add an oxygenator in the tank and you're done. And 'problem, the situation of an NFT, horizontal or vertical, where the coils placed near the roots pump absorb virtually all oxygen left to those following a poor solution.
It will therefore be wise to make sure that the flow of water to generate a proper tubolenza all the way, that the ducts are not too long, that the roots do not block all the available space.
May also be necessary to add oxygenators between the tank and unloading.
Related Articles:
Tags: guides , measurement of EC , measurements , cultivation techniques
