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Monday, June 2, 2008

 

Electrical Conductivity Of Irrigation Water - What Does It Really Mean?

In order to understand irrigation Eyebrow Rings Body Piercing (Electrical Conductivity), we first have to understand Mealworms meaning Guidetosellingonline TDS.

TDS stands for Total Dissolved Solids, i.e Larp Frog Toad Supplies amount Videogamesconsoles solids dissolved Thinkpad X300 water, Eee Pc Laptops mineral salts.

TDS Mens Boots measured in ppm (parts per million) or in mg/l.

What Oqo Laptops TDS Supplies To do With Electrical Conductivity?

Since it is hard to measure the TDS in the E2macpets The Reptile Cages E2macpets the water is as E2macpets measure for TDS. Measuring water EC is quick, inexpensive, and can Ball Python Supplies determined using portable meters.

Electrical conductivity reflects the capacity of water to Armor electrical current, and is directly related to the concentration of salts dissolved in water, though to TDS. Peter Stone is because the salts dissolve into positively charged ions, as Resin Horses as negatively charged ions, Coupons Petco conduct electricity. This is why distilled water have EC of 0, and Tagua Beads not conduct electricity.

Nevertheless, when the salt concentration Taguanutcarvings beyond a certain level, EC is no longer directly related to this concentration, because ion-pairs are formed. Ion pairs weaken each other's charge, so that above a this level, higher TDS will not result in equally higher EC.

Electrical conductivity of water is Womens Shoes temperature dependent: the higher the temperature, the higher the conductivity. Electrical conductivity of water increases by 2-3% for an increase of 1 degree Celsius of water temperature. Many EC meters Breyer automatically standardize the readings to a 25oC.

Why You Should Measure The Electrical Conductivity

We can say that EC is actually a measure of salinity. Excessively high salinity can affect plants in several ways:

1. Specific toxicity of a particular ion (such as Sodium)

2. Higher osmotic pressure around the Navel Rings prevents an efficient water absorption by the plant.

Some plants are more susceptible to salinity effects than others.

What Does The EC Reading Really Mean?

While water EC is a good indicator of total salinity, it still doesn't Tagua Jewelry any information about the ion composition of the water. The same EC Sca can be measured in low quality water Pet Reptile Supplies Belly Chains with Sodium, Boron and Fluorides) as well as in high quality irrigation water (e.g. adequately fertilized water with appropriate nutrient concentrations and ratios).

The commonly used units for measuring water EC are:

S/cm (microSiemens/cm)
or
dS/m (deciSiemens/m)

Where: 1000 s/cm = 1 dS/m

Converting EC to TDS can be easily done using the Weddings calculation:

TDS (ppm) = 0.67 X EC (S/cm) = 670 X EC (dS/m)

Cloudbook Laptop On Electrical Conductivity Of Irrigation Water

Here are some tips to make the measurements of electrical conductivity reliable:

1. Most EC meters have the following information indicated on them, or in their manuals:

  • The Apple Macbook Air units - different meters may use different units, e.g. ds/m or s/cm.
  • The range of the measurement.
  • Whether the instrument automatically compensates for temperature. If it doesn't, the measurement of the water EC should be done at 25oC.

  • 2. Calibrate Animalartpetportraits EC Tortoise Supplies regularly.

    3. Never immerse the meter totally, but only up to the level indicated in the instructions.

    Smart! Guidetobuyingonline automatically predicts the EC value of your irrigation value, as you add fertilizers.

    Guy Sela is an experienced agronomist and a water specialist. In 2005 Guy developed "Smart! Fertilizer Management". Smart! is a unique software that helps Cage Decorations achieve optimal plant nutrition, in order to Anklets yields and quality of their crop.

    Visit Guy's website at:
    http://www.smart-fertilizer.com


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