This paper will deal with our current work in defining nematode management zones. We are using soil electrical conductivity to define specific readings across a field and combining it with the yield response from nematicide treatments in these same areas. Yield moniters are currently being employed to get very specific information across the field and within specific nematicide treatments as it moves through the various soil electrical conductivity zones within the field. Combinations of yield data (either increases or where you no longer get a response) and SEC readings can then be used to better define the areas in a field where you can get a profitable response. Although nematode levels may be important, responses have still be observed to occur in only the lightest soils with fairly low SEC readings.