Soil electrical conductivity affects yields, crop suitability, plant nutrient availability and soil microorganism activity such as emission of greenhouse gases and respiration. Excess salts hinder plant growth by affecting the soil-water balance. Arid and semi-arid climates naturally have a higher salt content.
How can EC be reduced in soil?
Effective irrigation practices, which wash soluble salts out of soil and beyond the rooting depth, can decrease EC. Excessive irrigation and waterlogging should be avoided since a rising water table may bring soluble salts into the root zone.
How does conductivity affect soil?
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.
How do you test electrical conductivity in soil?
It is measured by taking a soil sample, making a saturated paste of soil and deionized water, extracting the water, and then measuring the EC of the extracted solution. Published EC values reported in the literature are almost always saturation extract EC.
What does electrical conductivity in soil mean?
The electrical conductivity indicates the amount of soluble (salt) ions in soil. PRINCIPLE. The determination of electrical conductivity (EC) is made with a conductivity cell by measuring the electrical resistance of a 1:5 soil:water suspension.
What is a good EC for soil?
As with most things in the soil, it is important that the EC does not get too high either, as too many of these nutrients, especially Na and Mg, can be detrimental to soil health. Optimal EC levels in the soil therefore range from 110-570 milliSiemens per meter (mS/m).
How do you change EC in soil?
Irrigation and Fertilizers
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.
What is the utility of soil pH?
The pH is important because it influences the availability of essential nutrients. Most horticultural crops will grow satisfactorily in soils having a pH between 6 (slightly acid) and 7.5 (slightly alkaline).
Why is texture important in soil?
The texture of a soil is important because it determines soil characteristics that affect plant growth. Three of these characteristics are water-holding capacity, permeability, and soil workability. … While plants need water, they also need air in the root zone.
Why is soil salinity bad?
If the level of salts in the soil water is too high, water may flow from the plant roots back into the soil. … Salinity affects production in crops, pastures and trees by interfering with nitrogen uptake, reducing growth and stopping plant reproduction.
How do you maintain soil EC?
When irrigating, applying more water than is needed for crops can help to leach excess salts below the root zone and maintain the desired EC level for the crop grown. Care is needed when applying excess irrigation water because the soil can become waterlogged, allowing salts to accumulate.
Which crop is highly susceptible to magnesium deficiency?
Corn. The loss of a healthy green color can be the first indication of a Mg deficiency. Color loss reflects the shortage of chlorophyll in the plant. As the deficiency becomes more severe, the area between the veins of the leaves becomes yellow while the veins stay green.
How is TDS measured in soil?
In addition, soil organic matter compounds such as humic/fulvic acids are also included in TDS. There are a variety of ways to measure TDS. The simplest is to filter the water sample, and then evaporate it at 180° C in a pre-weighed dish until the weight of the dish no longer changes.