Soil Salinity Measuring Device

The difference between the densities of the water and the float is related to the upward floating force of the float which can be calculated measured.

Soil salinity measuring device. Accurate field evaluations require sampling at various field. Generally speaking more than 18 millimhos per cm is considered highly saline. We used the fact that items with a density less than water float. This may be achieved by using various sensors on one measuring device and via a selective analysis of sensor readings.

The electrical conductivity or ec of a soil or water sample is influenced by the concentration and composition of dissolved salts. An electrical conductivity meter or ec meter is the only common device that can be used to measure the salinity of soil. An alternative method to measure soil salinity is using the routine 1 1 soil to water ratio method. Soil salinity is measured as electrical conductivity ec in units of decisiemens ds m.

In the field soil salinity is usually inferred from apparent electrical conductivity ec a using a range of devices depending on the required depth of analysis or size of the survey area. A simple protocol is described that tests soil salinity. This is used for this device. The salinity of soil is a dynamic parameter which characterizes the soil moment so the soil salinity measuring should be conducted taking into account all influencing factors.

My name is sonny and together with nico we made a salinity measurement device. How salinity is measured water and soil salinity are measured by passing an electric current between the two electrodes of a salinity meter in a sample of soil or water. Water soluble salts are extracted from soil samples and salt content measured. Salts increase the ability of a solution to conduct an electrical current so a high ec value indicates high salinity.

In this method a standard volume of water 10 ml is added to a standard weight of soil 10 g. Salt is extracted from the soil using one of two methods the most accurate and reliable of which is the saturation extract though this method must be done in a soil testing laboratory. Readings between 4 5 9 mmhos cm is considered low. Plan to amend the soil if the saline level is 18 mmhos cm or higher.

If you have 9 18 mmhos cm your soil is slightly saline.