Several important factors that affect the EC value of the soil include temperature, amount of fertilizers, salinity, moisture level, irrigation and types of soil. For the case of temperature , as the water temperature in the paddy field increases, the soil EC increases and vice versa.
What increases electrical conductivity in soil?
Adding organic matter, such as manure and compost, increases EC by adding cations and anions and improving the water-holding capacity. In some cases, a combination of irrigation and drainage is necessary to lower salt concentration and EC. An EC water (ECw) ≤ 0.75 dS/m is considered good for irrigation water.
How is the electrical conductivity of soil determined?
The electrical conductivity indicates the amount of soluble (salt) ions in soil. The determination of electrical conductivity (EC) is made with a conductivity cell by measuring the electrical resistance of a 1:5 soil:water suspension. Conductivity meter and cell. Shaking bottles.
How can the electrical conductivity of soil be reduced?
Electrical conductivity is generally used as an indication of salt concentration in soil solution or in nutrient solution – it increases as concentration increases and decreases as salt (or nutrient) concentration decreases. An easy way do decrease EC is by increasing the water content or decreasing salt concentration.
Can the soil conduct electricity?
Soils are electric current conductors, being usually clay soils, with finer particles and with greater points of contact between them, higher conductors when compared to sandy soils, with coarser particles and therefore with smaller points of contact between them.
How does EC affect plant growth?
In general, higher EC hinders nutrient uptake by increasing the osmotic pressure of the nutrient solution, wastes nutrients, and the increases discharged of nutrients into the environment, resulting in environmental pollution. Lower EC may severely affect plant health and yield [2, 9].
Does pH affect electrical conductivity?
As discussed, pH is the measurement of a specific ion (i.e., hydrogen). … So the short answer to the question about the relationship between pH and conductivity is as follows, the presence of any hydrogen ions present in a substance will impact the pH level and most probably influence conductivity levels.
What does high electrical conductivity in soil mean?
Soil electrical conductivity (EC) is a measure of the amount of salts in soil (salinity of soil). It is an important indicator of soil health. … Excess salts hinder plant growth by affecting the soil-water balance. Soils containing excess salts occur naturally in arid and semiarid climates.
What is a good EC for soil?
Optimal EC levels in the soil therefore range from 110-570 milliSiemens per meter (mS/m). Too low EC levels indicate low available nutrients, and too high EC levels indicate an excess of nutrients.
How do you increase EC in soil?
Salts are very conductive and will raise the EC of your soil. Water used to irrigate crops will directly affect the quality of the soil by either increasing or diluting available salts and nutrients. This in turn affects the electrical conductivity. Natural rains will dilute the amount of salt near the roots of plants.
What precautions will you take while measuring the electrical conductivity of soil?
1. The conductivity probe must be kept clean to obtain accurate measurements. Rinse the probe with distilled or deionized water prior to storage.
What precautions will you take while measuring the electrical conductivity?
Precautions to be followed while testing the electrical conductivity of liquids:
- see that the two metal pins or electrodes do not touch each other.
- Make sure the two pins or electrodes are in contact with the solution.
- After testing each liquid, wipe or dry the pins or electrodes.