EMI Soil Scanning
EMI Soil scanning is a tool that uses electromagnetic induction to send an electromagnetic signal through the soil and measure the signal that bounces back. The signal is measured at three depths to give a detailed map of soil variation between 25 and 90 cm.
This method measures soil electrical conductivity (EC) of the entire soil body, giving an accurate map of changes in texture and other properties in the soil.
Although texture is the main driving force behind EMI survey measurement of soil EC, several other factors also play a role in EMI readings like salts and rock content. Making EMI a fantastic tool to map soil variation before starting to dig holes (to look for variation).
Target Soil Sampling
No more using a grid sampling method and hoping to hit all the variation. With EMI soil scanning we plan your soil samples or investigation positions based on the amount of variation. Fewer holes when there is less variation and more where there is more variation.
Irrigation and Drainage design
As soil texture is the main driving force behind differences in soil EMI readings, it makes it the perfect tool to define where significant boundaries exist. This in return helps with improving the planning of irrigation block design and just as importantly drainage design.
As mulching is becoming more and more expensive, EMI allows for the effective use of this resource. When combining EMI data with crop health, we can identify areas where weak growth is associated with lower, more sandy soil. This allows you to create a more homogenous soil water dynamic across an irrigation block.